first off i'd like to say hi, this is my first post. woohoo. now down to business. i did a little search and couldnt find much at all about putting a turbo on a small block chevy. what i really want to know is how anyone made there headers or if they bought them anywhere. that is if anyone on here has a turbo'd chevelle. thanks for looking. see ya

The chevy guys don't seem to be into turbos like the ford crowd. Here's probably the best site for turbos and info. There's a GM sectiom thats just been added.


http://www.turbomustangs.com/forums/index.php?s=

heres some pics of my 69 chevelle


http://www.chevelles.com/showroom/Image%202%20resize.jpg


http://www.chevelles.com/showroom/Image%203%20resize.jpg

HOLY DOUBLE TROUBLE BATMAN! What kind of HP/Tourqe numbers on that thing?

thanks turbodave, i already surf regularly on turbostangs but i appreciate the insight. your car looks bad and i bet it puts out a lot. im gonna guess...600 to the wheels?

Diggler. I guess that just me , and turbodave are the only two.Mine is a 468/ garrett turbos.HP is unknown, I guess I will have to post for you guys. graemlins/waving.gif

Diggler. I guess that just me , and turbodave are the only two.Mine is a 468/ garrett turbos.HP is unknown, I guess I will have to post for you guys. graemlins/waving.gif

i see isee. thanks for the reply though. damn, 468 with twins? that thing must be shhhweet.

Those turbo's are sweet. Imagine telling the competition that you have a little 350 under the hood. Watch out!!!!!!!!!

TURBODAVE, That thing is just plain silly. I Love it! Too bad I have a little guy coming in two months, or I'd be doing somethijng like that. You have to post some dyno numbers, just for sh*@s and giggles. You must kill lots of mosquitoes with those open inlets. :D What are the two lines coming from what looks like a fuel distribution block on the fire wall? Must be either external oil lines or nitrous? I don't see any solenoids, so it probably isn't nitrous. I've heard of turbo guys using nitrous to cool the turbo down before.

Many guys run a shortie style header upside down, although that can cause hood clearence issues.

Yeah I like that pic turbodave and have actually used it for my Desktop instead of those fruity Windows bmp files that come with xp. graemlins/thumbsup.gif

Anyway, I'd be real interested in hearing how to set up a carb correctly for a blow through twin turbo application if anyone has any insite . . . Dave????

Last weekend on the TV hot rod shows ... I seen a huge segment that Gale Banks is offering turn-key twin turbo's for SBC. Either intake up or whole engine (800 & 1200HP levels). Nobody talked price though.

heres a couple of pics with the air filters on. That distribution block is for the 2 oil lines going to each turbo and port for my oil pressure gauge. I don't have any dynos numbers yet, only thing I have to go by is my friends 5.0 turboed stang. His car makes 606RWHP and is 600 lbs lighter than my car and I can outrun him by a substantial amount. Of course neither one of our cars hooks real good on stock suspension and drag radials, so its not a very good comparison.

Eric68, heres a link to how to setup a blow-thru carb
http://www.hangar18fabrication.com/blowthru.html


http://www.chevelles.com/showroom/Picture%20020.jpg


http://www.chevelles.com/showroom/Picture%20017.jpg

Last weekend on the TV hot rod shows ... I seen a huge segment that Gale Banks is offering turn-key twin turbo's for SBC. Either intake up or whole engine (800 & 1200HP levels). Nobody talked price though. Too much.... 30-45k I think. Paying for the name and R&D. Oh and all those fancing castings he has.
DIY probably 20k from scratch w/o the billet parts. The 1200hp needs all the hi $ stuff and you'd need to know someone to get the combo right in a reasonable amout of time.

Dave, where did you get the elbows coming of the turbos and how did you do the y pipe?

Turbos, A/R etc, heads, cam?
I've got a couple of H3's and I'm trying to figure out a combo that will take them.

There was a guy that posted on here not too long ago about building a single turbo kit specifically for chevelles. Here is his webpage, Hammerdown Performance Engineering (http://www.turbocustoms.com/) you can e-mail him for more info. I think he said prices were going to be in the 3-3.5K range. Hope this helps. graemlins/thumbsup.gif

Dave would you mind posting what kind of turbos you have. I have a chance to get two Garrett T04B turbos and am wondering if they will be usable for a smallblock turbo. Also if you could post engine specs(cam, heads,etc) Thanks

This kit is $6000;

http://bankspower.com/twin-turbo-system.cfm

I would think you could put together a decent set up from gathered parts for a lot less, at least thats what im gonna try.

Scott_68_SS, those elbows come from turbonetics.

The turbos are 62-1's with P Trim turbine wheels in .96 A/R housings

Heads are out of the box R-series big port heads from Trick Flow.
The cam is a off the shelf crane cams , reground with 114.5 LSA and .585 lift. 238@.050 duration

I was thinking of picking up a pair of Garrett T04B's think they will work? .60 A/R compressor housing with a 3 inch inlet and a 2 inch outlet. 54 mm compressor wheel. turbine with an A/R of .96.

62's huh, bigger than mine. I think mine are in the mid 50's. .96 a/r, who recommended that? What are you shifting at? I'm trying for 6k. I'm still trying to figure out the cam dur.. My turbos cam with .58 a/r P and I decided to just see how it runs. They were originally speced for a LS1 by Inov. turbo. Fell about 8-10 psi short of what he wanted. (900hp) The mustangs get away with .48's. Some like the .63's. All with S3/t3 stock tbird stuff IIRC. I think a .68(9?) will fit my CHRA so I can try that too.

I'm not sure on my sizing. Everybody I called said it will work. If I use Forced Inductions Flow Chart, everything looks ok on the surge side.
If I use Ray Halls calc, I might have surge problems on the lower rpm parts. Depends on how fast they spool. The builder I bought my turbos from said to not worry about the surge with my set up, but he was trying to get rid of them.
54-57 seems a little better match for what I want, but I got them cheap with only about 4hrs on them.

58 A/R seems alittle to low to me, but alot depends on the how exhaust is built, pipe diameter,lenght from exhaust port,EGT's, overall engine flow etc. I would try those first before I made any changes, if it boosts to early in the RPM range then I would try alarger A/R. Don't compare T-3 A/R's to T-4, Two different turbos,a 69A/R T-4 P-trim will not spool up at the same RPM has a .69 72 trim T-3

http://www.toohighpsi.com/BudgetTT/tt351W.htm

I know this is f*ord, but this would blow almost any NA motor out there off the road/track! for about a 1/6 of the cost. This would be right at home on any sbc.

Anyone Interested in starting a Chevy DIY turbo post on here perhaps we could post all of our ideas and progress. I am very interested in beating all these FOrd guys at the turbo game just seems like nice reliable HP :D

Sure, I'm up for it. But I'm in the parts gathering stage as money permits. Medium budget I guess you'd call it. Streching the time out to afford what I think I need. Provided I can figure that out.

FYI those are T3's S3 compressor, .63 A/R turbine I believe. Good for "only" 500 or so HP.
Notice how it makes boost at 2500.
But all done by 5k. Probably why it still works on a stock short block.

Edit: And that Y-pipe looks like a Flowmaster Y cut to fit....I flip through the Summit catalog like a woman does the sunday paper "on sale" stuff. :D

Originally posted by sobever066:
Those turbo's are sweet. Imagine telling the competition that you have a little 350 under the hood. Watch out!!!!!!!!! You can still tell them all you have is a 350 with this setup. Would think they would find out fast though after you pulled far enough away from them and they can see under the rear of your car

http://www.ststurbo.com/about_sts_

Im still in the parts gathering stage also. I need some input on cams from you guys and also on headers. I was planning on using some shorties flipped. Any suggestions would be appreciated, also where does the oil come from to lube the turbos? I was thinking about taking it from the oil pressure port on the back of the block.

Anyone out there making any progress on their cars. Dave if you read this I need to know what kind of headers you used.

Anyone out there making any progress on their cars. Dave if you read this I need to know what kind of headers you used.

Originally posted by turbodave:
heres some pics of my 69 chevelle


http://www.chevelles.com/showroom/Image%202%20resize.jpg


http://www.chevelles.com/showroom/Image%203%20resize.jpg Incredible!! Where did you get the carb hat? Who did the bends from to turbos to the hat? Did you have the intake piping coated or did you just paint them yourself?

Sorry for all the questions.

Will be interesting to see if that setup will clear the hood.

You will also note that Dave is not running a PB booster. Best I can tell, you need either a manual master cyl or a Hydro boost. I'd prefer to not spend $300+ for a hrdro when I just replaced the booster/mc on my car 4 yrs ago. A oval tube might fit through there, but will up the cost unless you DIY the oval. Not sure how to do that though.
I've decided on a medium sized single. It's cheaper and a little easier to plumb. And I think I can keep the AC compressor too.
Going to take me at least a year to finish gathering the parts....

On a TT intake, I've seen the turbos plumbed straight to the top of the hat. No elbows. Not sure if that's a good or bad trade off flow wise into the carb.

I've got some parts gathered and I am going to do a single turbo setup first then possibly build a twin I will post pics when I get the engine installed in my test mule.

Will be interesting to see if that setup will clear the hood.

clears the hood just fine.

You will also note that Dave is not running a PB booster

Yeah, just plain ol factory manual brakes

On a TT intake, I've seen the turbos plumbed straight to the top of the hat. No elbows. Not sure if that's a good or bad trade off flow wise into the carb.


The CSU bonnet like I use or the EV bonnet are to two most popular and make the most HP. There are other designs out there, but these two work the best, so I did what I had to to use it.

http://www.chevelles.com/showroom/slicksty7/slicksty7003.jpg My hat is spiral interior works great!and clears the hood too!

http://www.chevelles.com/showroom/slicksty7/slicksty7006.jpg See works just fine..

Originally posted by turbodave:
The CSU bonnet like I use or the EV bonnet are to two most popular and make the most HP. There are other designs out there, but these two work the best, so I did what I had to to use it. What is the inlet diameter of the CSU bonnet before the Y-pipe was installed?

If its 4" then I'm in business. Flowmaster makes a 2 into 1 Y-pipe that has a 4" outlet and could be cut down and mated to the CSU bonnet.

Not sure if did the samething, but yours is super clean anyway.

Just like you, once I had the turbo to y-pipe bend completed, I'd weld those directly to the Y-pipe and use hose and clamps to secure the Y-pipe to the bonnet and to the turbo air outlets.

Here a link for the Flowmaster Y-pipe: http://store.summitracing.com/default.asp?target=esearch.asp&N=100&Ntk=PartSearch&Ntt=FLO-Y300400&x=13&y=8

why is it that none of you guys are running intercoolers?

I didn't put a intercooler on for several reasons

1. a good intercooler big enough to flow the cfm I need is about 1500.00 minimum. My car needs a lot of work and that money could be used elsewhere.

2. the fuel vaporizing through the venturis has a cooling effect on the air charge, and its free

3. with the twin turbos and a intercooler would mean 15 feet of pipe snaking around under the hood and I really don't want to fight with that every time I am working on the car.

4. I just wanted to keep it has clean and simple as possible

slicksty7, that setup is sweet, nice job! graemlins/thumbsup.gif

Thanks for the compliment Dave. 300hp I feel that I don't have enough psi to have to use a intercooler.This is one reason I went with 2 of them.Also I don't stay on the peddle that much!

turbodave:

I had asked a few questions in earlier posts, I guess you missed them, so I'll ask again.

#1: Who did the bends from to turbos to the hat?

#2: Did you have the intake piping coated or did you just paint them yourself?

#3: What is the inlet diameter of the CSU bonnet before the Y-pipe was installed (as you bought it)?


Thank you for your time.

turbodave:

I had asked a few questions in earlier posts, I guess you missed them, so I'll ask again.

#1: Who did the bends from to turbos to the hat?

#2: Did you have the intake piping coated or did you just paint them yourself?

#3: What is the inlet diameter of the CSU bonnet before the Y-pipe was installed (as you bought it)?


Answers:
1. I made them out of a couple 2.5 inch mandrel bends.
2. the compressor housings and that elbow are ceramic coated, the rest is just black heat paint.
3. its 3 or 3.5, I can measure it tomorrow when I get to the shop.

Originally posted by turbodave:
</font><blockquote>quote:</font><hr /> turbodave:

I had asked a few questions in earlier posts, I guess you missed them, so I'll ask again.

#1: Who did the bends from to turbos to the hat?

#2: Did you have the intake piping coated or did you just paint them yourself?

#3: What is the inlet diameter of the CSU bonnet before the Y-pipe was installed (as you bought it)?


Answers:
1. I made them out of a couple 2.5 inch mandrel bends.
2. the compressor housings and that elbow are ceramic coated, the rest is just black heat paint.
3. its 3 or 3.5, I can measure it tomorrow when I get to the shop. </font>[/QUOTE]Thank you for the reply. I have one more set of questions for you:

#1: What size is your turbo small block, what rod length?

#2: What tranny are you running and what was done to it to hold up under the HP/TQ?

Thank you again Dave.

I have the CSU Hat on my Procharged BBC it has a 3.5" inlet.

Stupid Question: Are you guys running carbs for the same reasons that ATI recommends a blow-through carb setup for supercharged systems? i.e. compared to TT EFI... that the blow-through introduces a cooling effect that you would lose with EFI?

Just curious... cus I'd love to do a TT setup my 'velle... but would like the nice temprement of the EFI setup... but not if that displaces the advantage of using a carb.

PS. I would also like to hear what you guys think about possibly doing a big cube TT SBC.. like a 427 or 454 small block TT. That should be pretty sweet considering the weight your saving off the front end (compared to a BBC).. plus all those cubes and TT.