FI heads??
Team Owner
Joined: Mar 2003
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St. Jude Donor '03 through '17
New turbos and wastegates as well. My old numbers are floating around somewhere. I don't expect much with the exception of my power delivery throughout the curve will be a smoother transition along with more up top.
Thread Starter
Safety Car
Joined: Jul 2004
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From: Valrico Florida
Well that makes sense. I thought the AFR225's were for 4.00 and above bore. You are 3.90 since you have stock block and run a bigger crank.
Le Mans Master
Joined: Sep 2000
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From: Clouds Over California
This will be interesting I am anxious to see how many cars our there are over 800+ rwhp using LS6 heads. I have been using my WCCH LS6 heads for 6 years now...with a S/C and two different turbo kits.
Twin Turbo Coupe
Joined: Apr 2005
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From: Frederick MD
830 rwhp here running worked LS6 heads with 18#'s for 1.5 years...no problems
Team Owner
Joined: Jul 2003
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From: Detroit
Unless you need the thicker deck or are building a ***** deep race car I'm not sure there is really a point in most of the after-market cylinder heads. If you can plant 800 rwhp more power to you. At some point you have to ask yourself how much money do you want to spend to spin your tires.
Race Director
Joined: Dec 2003
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From: Texas
Racer
Joined: Dec 2006
Posts: 322
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From: Alexandria Louisiana
St. Jude Donor '08
Good Point!
Unless you need the thicker deck or are building a ***** deep race car I'm not sure there is really a point in most of the after-market cylinder heads. If you can plant 800 rwhp more power to you. At some point you have to ask yourself how much money do you want to spend to spin your tires.
into my head. I keep wanting to up the boost from 14# to 17# on my Stage 3 heads & when he told me that I MIGHT have some head lift, I've been considering the AFR's ( 205's on my small bore 383 cid F1-R ). I'm making 752 rwhp @ 14# & can spin the Pilot Sports @ 60 mph in third gear so he keeps asking me just how in the H*** I think I can plant the additional 80 rwhp that the extra 3# of boost should yield!!?? 
Your reply ALMOST makes me open my eyes to his/your point!! 
Gene
Last edited by Mean Gene55; May 7, 2008 at 06:57 PM. Reason: Add comment
Team Owner
Joined: Jul 2003
Posts: 20,474
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From: Detroit
For example, I've tried turning up the boost a couple of times at the track and the car never went faster because the tires just went up in smoke.
Now, if I could ramp up the power with some sort of boost-by-gear type deal with the boost controller then I might see a better slip.
I say just enjoy what you have, but I don't want to be a hypocrite as I've swapped combos several times in search of more power, or just boredom.
Good luck.
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Thread Starter
Safety Car
Joined: Jul 2004
Posts: 3,706
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From: Valrico Florida
I'm making 752 rwhp @ 14# & can spin the Pilot Sports @ 60 mph in third gear so he keeps asking me just how in the H*** I think I can plant the additional 80 rwhp that the extra 3# of boost should yield!!?? Your reply ALMOST makes me open my eyes to his/your point!!
Gene
Your reply ALMOST makes me open my eyes to his/your point!! Gene
Racer
Joined: Dec 2006
Posts: 322
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From: Alexandria Louisiana
St. Jude Donor '08
Good Advice
Vince - how scary was getting loose @ 120 mph????
Thread Starter
Safety Car
Joined: Jul 2004
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From: Valrico Florida
Le Mans Master
Joined: Sep 2000
Posts: 6,976
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From: Clouds Over California
Unless you need the thicker deck or are building a ***** deep race car I'm not sure there is really a point in most of the after-market cylinder heads. If you can plant 800 rwhp more power to you. At some point you have to ask yourself how much money do you want to spend to spin your tires.
I think the fact that there are a couple of different turbo kits making over 800 rwhp with re-worked LS6 heads and on 346cids is proof that it is not as critical...just like having a big cam with FI doesn't mean as much...I'm still running the same cam 224/224 for the last 6 years as well.
I'm not trying to knock aftermarket heads and big cams...I agree that one can get to a hp level that is plenty high enough using reworked GM heads.
If I was running a NA setup...I really like the AFRs, All Pro, Eldebrock, and ETP heads. I don't even know which ones I would pick out of the above as they all have advantages.
Thread Starter
Safety Car
Joined: Jul 2004
Posts: 3,706
Likes: 2
From: Valrico Florida
I ran some 6.0L heads done by Futral Motorsports and Meaux Racing and my car NA made a best of 564rwhp/518rwtq on pump gas in my old F body. It was a 408ci setup. I held the 408ci hydraulic cammed dyno record for 2 years. Hell I can only think of one 427ci that put out better numbers back then. My numbers were verified on several dynos..
I am pretty sure flow can be duplicated by good porters. I cant imagine what my current heads could do in the hands of FMS/Meaux.
I am pretty sure flow can be duplicated by good porters. I cant imagine what my current heads could do in the hands of FMS/Meaux.
Melting Slicks
Joined: Dec 2005
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From: sterling ct
my 87 was a hooking machine... atr suspension kit and with mccrearys i would do high 1.50's on slicks i would nail the 1.50 mark never went 1.49...
i loved my gold type-t champion iron heads, john craig te-63, dequick front mount- houston down pipe...not much else and i was 11.20's @ 121 on 50/50 mix.
i loved my gold type-t champion iron heads, john craig te-63, dequick front mount- houston down pipe...not much else and i was 11.20's @ 121 on 50/50 mix.
Vince & Mark - Yes, it certainly DOES make sense. I remember the days of racing my '87 Lingenfelter 383 'Vette vs some Grand Nationals & I'd ALWAYS take them out of the hole because they'd spin. Sure, the smokey burnouts looked cool but while the crowd was cheering him I was putting some lengths on him!!
Vince - how scary was getting loose @ 120 mph????
Vince - how scary was getting loose @ 120 mph????
Racer
Joined: Dec 2006
Posts: 322
Likes: 0
From: Alexandria Louisiana
St. Jude Donor '08
my 87 was a hooking machine... atr suspension kit and with mccrearys i would do high 1.50's on slicks i would nail the 1.50 mark never went 1.49...
i loved my gold type-t champion iron heads, john craig te-63, dequick front mount- houston down pipe...not much else and i was 11.20's @ 121 on 50/50 mix.
i loved my gold type-t champion iron heads, john craig te-63, dequick front mount- houston down pipe...not much else and i was 11.20's @ 121 on 50/50 mix.
Last edited by Mean Gene55; May 9, 2008 at 02:55 PM. Reason: Add comment
