11's in a steel car with a Qjet? - Page 2 - Chevelle Tech
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post #16 of 44 (permalink) Old Jan 1st, 19, 11:39 AM
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Chris
 
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Re: 11's in a steel car with a Qjet?

My buddy went an 11.0 with his 71 BBB GS street car.
Used the power window to get his time slip.
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73 nova,3515#(all steel)Pump gas!(91octane)406ci N/A, best 1/4,1.45 '60,[email protected],10.6 @ 122.38, short shifting,NO tuning!


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post #17 of 44 (permalink) Old Jan 1st, 19, 12:00 PM
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Re: 11's in a steel car with a Qjet?

Greg Gessler from New Jersey hit a 10.99 several years back in his Stock Appearing 72? Buick GS with an iron Buick intake and iron Buick heads, using a Q jet, so it is possible.

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post #18 of 44 (permalink) Old Jan 1st, 19, 12:10 PM
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Re: 11's in a steel car with a Qjet?

Quote:
Originally Posted by dyno jonn View Post
Greg Gessler from New Jersey hit a 10.99 several years back in his Stock Appearing 72? Buick GS with an iron Buick intake and iron Buick heads, using a Q jet, so it is possible.
I was at Robs shop for a Christmas party last week with Greg.
He and Rob are very good friends!

73 nova,3515#(all steel)Pump gas!(91octane)406ci N/A, best 1/4,1.45 '60,[email protected],10.6 @ 122.38, short shifting,NO tuning!


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post #19 of 44 (permalink) Old Jan 1st, 19, 1:32 PM
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Re: 11's in a steel car with a Qjet?

Quote:
Originally Posted by 427L88 View Post
wonder if we could fit a dual flange manifold on that rat!? I cant seem to find one other than the rectal port ones, akin to the marine manifold I have, GM dual flange, rect port.
Here you go Gene:

https://paceperformance.com/i-625506...read-bore.html



Do it! IMO, Q-jets are THE best street carb for almost any real street car. I run high-12's @ 108 mph with a Q-jet on my 355.
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post #20 of 44 (permalink) Old Jan 1st, 19, 1:57 PM
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Re: 11's in a steel car with a Qjet?

All this talk of the Qjet makes me want to dig all mine out and see if i have a decent amount of parts to do a tunnel-ram dual carb set up.
I have been wanting to pull the RPM air gap off my 57 4door as it does not like this cold winter air.
My RPM did better and I have ran a tunnel-ram in the winter and had no issues like the RPM air gap is giving me.

Better velocity i suppose with tunnel-ram and the old RPM got some more heat in the runners.

When I tested Qjet vs my Holley on the RPM intake the Holley was 10 hp better at the wheels.
When I tested the same 2 carbs on a ported Q jet intake the Q jet was 10 Hp better.

That huge secondary side plays well with the correct intake.
Like stated I would need to play with tunnel-ram plenum volume.. I would try it with spacers though.

I have lots of AFB and Edelbrock Square bores to test the Q jets against.

My 78 Nova went 12.9 @ 110 with TH350 and uniroyal tiger paws 275-60-15 and 350" with Q jet intake and iron exhaust manifolds Q jet carb and single point distributor I was using 186 casting heads I ported everything manifolds and all.

Headers and RPM intake took it to 12.5 et with same tires.
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post #21 of 44 (permalink) Old Jan 1st, 19, 4:57 PM
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Re: 11's in a steel car with a Qjet?

One of my close friends, Bob Hinson, has a '67 pontiac tempest that has gone 11-teens with a quadrajet, no nitrous, and air conditioning/power steering. This was like 20 years ago. In fact, in 1995 I think car craft did a full 5 page feature on his car. He has owned it since 1973 and still has it. It's a 462 stock block based engine, nothing radical. It's heavier than stock with the cage. It's a real show car in addition to the performance. Oh, it's a pontiac engine too.
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post #22 of 44 (permalink) Old Jan 2nd, 19, 3:02 AM
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Re: 11's in a steel car with a Qjet?

Quote:
Originally Posted by 72BB Nova View Post
When I talked with Sean Murphy a couple months ago about my new 800 I had him build for my truck, I asked him about a Quadzilla for my Nova. He said with a 454 you could run a cam in the low 240's @.050 and with a 496, low 230's, I don't think they like a tight LSA either. Your thinking like I am with building a nice 454 or 496 and make it look like a 325/396.
Been working on the make a 454 to look like a 325/396.


I got ahold of a 800cfm. Q-jet myself and have massaged a old high rise for just that purpose.
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post #23 of 44 (permalink) Old Jan 2nd, 19, 7:14 AM Thread Starter
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Gene
 
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Re: 11's in a steel car with a Qjet?

Quote:
Originally Posted by 72BB Nova View Post
When I talked with Sean Murphy a couple months ago about my new 800 I had him build for my truck, I asked him about a Quadzilla for my Nova. He said with a 454 you could run a cam in the low 240's @.050 and with a 496, low 230's, I don't think they like a tight LSA either. Your thinking like I am with building a nice 454 or 496 and make it look like a 325/396.
Am having an engine created to replace the 427. More of a stock 375/396 idle ( similar to LS6 as I was told). I could always run the tripower again, yet Mark will ship it with a single 4 bbl mani on there. I think I would prefer a dual flange, as its alot more likely to run a QJet .

Emailed Cliff Ruggles some time back ( he runs an 11 sec Buford) and he echoed what you all said, trying to make power out of a Qjet requires big volumes, not pressures. so to optimize for a Q. i;d have to plumb new lines I think, or at the least push the fuel up to the mech pump.

That GMPP intake looks OK, except I'd have to stealth it out with orange paint. ( a far cry from a mirror polished tripower intake! ) Then I could run my detailed out orange valve covers.

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post #24 of 44 (permalink) Old Jan 2nd, 19, 8:16 AM
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Re: 11's in a steel car with a Qjet?

Quote:
Originally Posted by 427L88 View Post
That GMPP intake looks OK, except I'd have to stealth it out with orange paint. ( a far cry from a mirror polished tripower intake! ) Then I could run my detailed out orange valve covers.
Edelbrock also makes the identical intake: "Performer RPM Qjet" and its probably a few dollars cheaper than the GMPP.
I think it would be pretty cool to have the new engine dressed as a L35 396 complete with the Chevy orange "sleeper" intake,Qjet and factory chrome covers. Nice sleeper.
Plus you can play too..run a Qjet or square bore Holley or go back the tri-power too. Options are nice
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post #25 of 44 (permalink) Old Jan 2nd, 19, 9:00 AM Thread Starter
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Re: 11's in a steel car with a Qjet?

750dp, 850 dp, 3X2 or Qjet. I mean it wont be a F.A.S.T. car Chris, non oem intake, but....... thnx for tip on Eddy intake. Will insist on Mark using it. I;d rather grind EDELBROCK off than a bowtie anyhow when I de-bling it.
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post #26 of 44 (permalink) Old Jan 2nd, 19, 6:34 PM
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Re: 11's in a steel car with a Qjet?

Then why not just a Holley aka 396/375 and be done with it?

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post #27 of 44 (permalink) Old Jan 2nd, 19, 11:34 PM
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Re: 11's in a steel car with a Qjet?

Quote:
Originally Posted by LaVelle View Post
Been working on the make a 454 to look like a 325/396.


I got ahold of a 800cfm. Q-jet myself and have massaged a old high rise for just that purpose.
I've got 2 of those intakes myself. I've often wondered how they would compare to a Performer RPM Q jet with some work done to them. Me personally I would rather look at a stock appearing BB than one that has a bunch of chrome and billet aluminum all over it.
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post #28 of 44 (permalink) Old Jan 3rd, 19, 6:39 AM
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Re: 11's in a steel car with a Qjet?

Reread this thread. Are you planning to run a snorkel air cleaner with the heated air, etc? or an open air cleaner? I'd be more impressed to open the hood and see a Holley on a factory appearing intake with correct fuel system plumbing.
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post #29 of 44 (permalink) Old Jan 3rd, 19, 6:53 AM
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Re: 11's in a steel car with a Qjet?

Edelbrock makes RPM quadrajet bbc intakes.
https://www.edelbrock.com/performer-...6-5l--v8-45431
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post #30 of 44 (permalink) Old Jan 3rd, 19, 7:45 AM Thread Starter
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Re: 11's in a steel car with a Qjet?

Quote:
Originally Posted by GRN69CHV View Post
Then why not just a Holley aka 396/375 and be done with it?
aw heck Joe, I got two of those ready to go. Why? Because its a 325 hp 396 car and everyone runs a holley. The stock Holley 600cfm wont support 600 hp, my 850 might. As might a Qjet. The tripower would be worse than a Qjet, hp wise. I'd like t try and get it plumbed sort of oem, but snorkels scare me. I'd have to open the thing up somehow.

Undecided, but I think I'll use the EDEL Qjet rpm on the 475 if the builder is OK with it. Then I can slap a SMI Quadzilla on the beast. I fact, I may have it shipped to him to dyno it and see how much it loses over the 1000cfm he typically uses in his dyno. Or not.

Why not? Mom worked at RPD, its in my blood!

So not the right thread, but 325 HP SS cars didnt have chrome valve covers did they? Or did they? I seem to remember Qjets and orange covers , but it must've been on an Impala or Biscayne.
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