[sidehiller_5]

ive been plugging away at my 72 chevelle , (its in the project thread area) and have come to planning a powerplant. here is what i was thinking.
-currently have 454 with stock 781 heads and low compression pistons for around mid 8's cr.
-has stock Rochester 750 carb and 2 bolt main.
-used a compression checker and all 8 cylinders create same compression (rings all good, and only 30,000 on odometer!)
-flat tappet valve train with solid rockers
-maybee is at 410 hp


i am seriously considering boosting this instead of replacing many parts to get higher cr, and some better flowing heads to be around 600 hp/tq


these are my plans, please let me know if it all sounds right and matches my correct goals as this is my first with boost build.

**would like 650hp/tq, a very strong low / mid range to help motor pick up untill boost starts to kick in around 3000rpm. only need about 6000 rpm max, and will be 90/10% street strip in that order.

- replace main cap fasteners to ARP to help out the 2 bolt mains as much as i can
-performer rpm intake manifold
-quick fuel blow thru 750 cfm carb with vacuum secondaries
-got a comp 274h cam shaft for free should i use it?
-double roller timing chain from comp cams (got for free to hehe, brand new)
-replace valve seats
-replace valve springs, (not sure what to replace with)
-roller rockers from comp
-3/8 push rods upgrade w/ guides
-upgrade to the new msd digital e curve distributor
-headman 68198 headers 1 3/4 and 3'' collector

as for the supercharger
-got my eye on a local used v2 from vortech
-and a pro charger p1sc (preferred, but is about 800 buck more)
-vortech race bypass valve
-extreme velocity air hat for 4150 style carb
-6 rib pulley set up to produce me about 8psi

some of the grey areas i need to find out are if i should switch to elec. fuel pump, or if there is a mech one i can use
- and if 8 psi is going to be enough to get to the desired hp with lacking head flow, and small valves

will be matted to a 700r4 full manual rev/ vb 2800 stall, built for 750ft/lbs and 3.73 gears

any input is appreciated, i think this route might be cheaper for me than building a n/a motor to get the equivalent hp.

 

[Steve R]

If you want your 454 to live with 600+ boosted horsepower at 6000 rpm for any length of time you will need to go through the bottom end.

Steve R

 

[VinceS427bb]

you will need a fuel pump that can provide additional fuel pressure on a 1:1-ratio
for each pound of boost..
vacuum secondary carb is not the hot ticket.
better rods, forged pistons, better valve springs, will be needed.
arp-main studs will help,
depending on the cam you may want to limit rpm to under 5800 to help this combo live...

 

[496malibu]

Go E85 for non intercooled. Mechanical secondary carb, as for going through the bottom end to make it live, thats what you will read and hear everywhere. If you are "safe" on the tune and watch the plugs as long as you do those things 600 hp is very doable. Ive been beating on mine for over 8 years now.

 

[Andy's Auto Repair]

Where were you inMarch when I sold an in the bag V2 rebuilt by Vortec for $350??

I know, always happens.

But yeah, 10 PSI, E85 without an intercooler, you will hit 600 FWHP pretty easy if you pay attention to the details.

 

[sidehiller_5]

Where were you inMarch when I sold an in the bag V2 rebuilt by Vortec for $350??

I know, always happens.

But yeah, 10 PSI, E85 without an intercooler, you will hit 600 FWHP pretty easy if you pay attention to the details.

wow i wish for that price

 

[sidehiller_5]

so will my cam be allright with this setup, or am i better off with somthing else? i would really like to stick with mech fuel pump, i hate the sound of electric. just need to know what fuel setup would work

 

[VinceS427bb]

so will my cam be allright with this setup, or am i better off with somthing else? i would really like to stick with mech fuel pump, i hate the sound of electric. just need to know what fuel setup would work

the cam will work ok even with a 110*LSA
your mech fuel pump most likely will not: unless it can deliver 15-20psi on demand
you will need a boost referenced fuel pressure regulator to provide a 1:1 ratio increase in fuel pressure as boost pressure rises=
start with base fuel pressure of 6psi, then add 8#'s of boost pressure; means that you will need/have 14psi of fuel pressure at the car for that level of boost:thumbsup:
oh yeah on a supercharged you most likely will not hear an electric pump unless the engine stalls or stops...

 

[USMC_Spike]

ive been plugging away at my 72 chevelle , (its in the project thread area) and have come to planning a powerplant. here is what i was thinking.
-currently have 454 with stock 781 heads and low compression pistons for around mid 8's cr.
-has stock Rochester 750 carb and 2 bolt main.
-used a compression checker and all 8 cylinders create same compression (rings all good, and only 30,000 on odometer!)

Sidehiller, what did your compression check out to be in PSI?

Thanks, I need it for reference to my engine.

Thanks.

 

[blue66]

If you don't want electric you may look into these.....http://www.racepumps.com/index.html

 

[sidehiller_5]

i honestly cant remember the psi, i just know it was within 6psi between all plug holes. might have been around 100??? don't quote me on it

that mech fuel pump = boost reff. reg from "race pumps" looks like the ticket so far.

and i ended up getting a vortech v2 off eBay for what i thought was a good deal. a mech checked it out supposedly, and it spun freely and had no end play. just need a bypass valve from vortech yet.

all these mounting plates seem ridiculously overpriced, i was thinking about buying a 60 dollar universal v2 bracket and fabing something up myself from a pick and pull pulley setup with tension-er. any one got some pointers?

 

[BACK FROM THE DEAD]

Where were you inMarch when I sold an in the bag V2 rebuilt by Vortec for $350??

I know, always happens.

But yeah, 10 PSI, E85 without an intercooler, you will hit 600 FWHP pretty easy if you pay attention to the details.

Friggin PUKE in my mouth!!! Dude I've been keeping my eye out for one of those for my little S281 Mustang.
I'd have snapped that up in 2 F'ing seconds for it...:sad:

 

[sidehiller_5]

i need something clarified. the e-85 that every one is talking about, this has actually 105 octane? i am talking about the cheap gas available at every pump around town. seems to good to be true. i am just starting to dig into this stuff. i have been staying away from it, and buying aviation fuel for my hi-comp snowmobile engines. will this stuff actually be better?

if that's the case i should almost bump up compression with some new pistons/ or shaved head to around 10.1 and then add 8psi of boost! (might destroy my 2 bolt main thou)

e-85, i thought this stuff was garbage water laced fuel