 |
|
| Pontiac - Boost Turbo, supercharged, Nitrous, EFI & other Power Adders discussed here. |
| Reply |
|
|
Thread Tools | Display Modes |
|
#1
11-15-2015, 01:52 PM
|
|||
|
|||
Better head for nitrous
Would my 340cfm e heads work well on a 535 with heavy nitrous or should I get a different head?
|
|
#2
11-15-2015, 04:17 PM
|
||||
|
||||
|
How quick do you want to go?
Tom V.
__________________
"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
|
#3
11-15-2015, 05:57 PM
|
|||
|
|||
|
Tom I'm trying to get in the mid 4's in the 1/8.(4.70-4.50) I don't have the 535 yet but I have the heads on a 474 right now.
|
|
#4
11-16-2015, 12:53 PM
|
||||
|
||||
|
Quote:
__________________
540 c.i. Ultra Street Combo Tiger Heads with Tiger Intake Induction Solutions fogger with .046 jet First ultra street/ultimate street NOS car to get into the 4's! 1.079 4.559 153.23. 3100 lbs 7.77 @ 169 1/4 Mile (2015) with EHTTFMF!! T2TTFMF! Special Thanks to: Ron at Rhodes Custom Auto Butler Peformance Jim Hostler's Transmissions (HOSGTO) on here Induction Solutions BES Racing Engines. Cheeseburger VP Racing Fuels Calvert Racing |
|
#5
11-16-2015, 02:58 PM
|
||||
|
||||
|
Jeff can give you some good advice for sure.
Tom V.
__________________
"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
|
#6
11-16-2015, 05:00 PM
|
|||
|
|||
|
Sorry for the late reply the car with me in it is 2701.It's a stock suspension 85 mustang with a powerglide transmission 3:90 rear 28 inch tall tire
|
|
#7
11-19-2015, 07:36 AM
|
||||
|
||||
|
Lots a variables affect your final results. But I think 340 cfm is going to make your goal hard to reach. You can't just keep jetting the nitrous bigger and keep making gains. You will find the heads will choke and determine a practical ceiling. You'll likely need something over 400 cfm, and there are choices now that go significantly beyond that.
Eric
__________________
"Everybody has a plan until they get punched in the mouth" noted philosopher Mike Tyson Life begins at the end of your comfort zone. “The mind, once stretched by a new idea, never returns to its original dimensions.” |
|
#8
11-20-2015, 01:49 AM
|
|||
|
|||
|
Thanks Elarson.I talked to the guy at EIC motorsports and he told me the same.Time to upgrade.Thanks for the replies.
|
|
#9
11-21-2015, 10:25 AM
|
||||
|
||||
|
I'll sell you a set of EIC motorsports 400+ cfm E-heads
__________________
Quote:
4.53 @ 164mph |
|
#10
11-21-2015, 11:17 PM
|
|||
|
|||
|
I have found after running E-Heads and Tiger Heads with heavy N20 loads of up to 600 HP, that the Tiger heads lasted longer between head gasket failures. The E-heads are just so light, thin and have so much water jacket that they eventually "hump-up" and fail between the center cylinders where the 2 exhaust valves reside. We ran copper gaskets with o-rings and steel step washers at each head stud. We could get 10-15 passes out of them and then the heads had to come off and be resealed. That was at 1350 net HP. The Tiger heads with the same tune-up would go 20-25 passes and then have the same problem. But that was at 1500 net HP. The e-heads were 370 CFM and the Tigers 425 CFM. The Tigers made 100-110 more HP NA than the E-heads we were using. A couple of additional factors. We didn't run Cometic gaskets, they might help. We also ran a wet deck, a dry deck might help. Finally, the copper alloy insert Calvin Hill markets and installs would certainly help either head hold a gasket with big N2o use. If I had it to do all over today, I would take a close look at the Ram Air V offerings out there. Getting those damn center exhaust valves separated for nitrous or supercharged applications would have to help the gasket situation. My proof of that is the fact we are still running the very first set of copper gaskets on our Ram Air V based nitro engine after 4 years.
|
| Reply |
|
|
The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.
Linear Mode
