In about a month........

Reply Subscribe

Thread Tools

Search this Thread

Apr 24, 2010 | 10:47 AM

#21

Weav's Vet

Thread Starter

Safety Car

Joined: Dec 2007

Posts: 3,616

Likes: 5

From: Sandhills of North Carolina

Quote:

Originally Posted by cuisinartvette

Adding to the cost of mods while youre doing it is never convenient but if you somehow can cut the decks back down the car will like it.

It'll have to be what it is. Broke now.

Apr 24, 2010 | 10:55 AM

#22

Weav's Vet

Thread Starter

Safety Car

Joined: Dec 2007

Posts: 3,616

Likes: 5

From: Sandhills of North Carolina

Quote:

Originally Posted by tombrammer

Weav. I subscribe to chevHI performance mag, back in 99 they built an LT1 with a hot cam kit and LT4 heads, it make 129hp over stock with headers and 52mm TB. You should be above that. I imagine with that cam you have, the AFRs are really going to wake up your motor a whole bunch. The really interesting thing about the CHP build was that the increase in cam duration and even the move from 170cc to 195 cc heads added torque all thru the whole range even at 2500rpm. Did you ever see this guys car? @http://www.cardomain.com/ride/2467023 He ran a 11.4 @120 with a setup similar to yours.

By the way are you thinking turbo or super charger with that 65cc chamber, ha ha!

That's quite a ride isn't it! Very nice!

I doubt I'll see that much gain though.

No turbo or Super charger here. Way out of my $$$ range. Mike (STL94LT1)was right on about the 383 though...........

Last edited by Weav's Vet; Apr 24, 2010 at 07:20 PM.

Apr 25, 2010 | 11:35 PM

#23

94vettelover2

Burning Brakes

Joined: Oct 2009

Posts: 773

Likes: 2

From: Minneapolis MN

That would be a total of a 74 rwhp increase from heads/cam over what I had with bolt ons. A little over 100 from the stock dyno run I made. Still not bad and hopefully will put the car in the upper 11's at the track.

Not to change subject but what bolt-ons do you have?Also what does your car do in quarter-mile?I ask because I have the same set-up as you(94 auto)but basically stock & wondered how much those bolt-ons lowered the quarter-mile time to.It will also let me get an idea on how to get close to your time with your bolt-ons.

Apr 26, 2010 | 01:27 AM

#24

96 lt-4

Drifting

Joined: Oct 2005

Posts: 1,920

Likes: 51

From: Angier nc

The afr heads maintain port velocity so you don't see the typical loss of low speed torque.
A dyno tune will be critical.If you don't have one down there let me know and I can set you up with a couple ofvery highly regarded shops up here that specialize in GM.One of them did mine.I would be happy with either one.

Apr 26, 2010 | 01:45 AM

#25

Weav's Vet

Thread Starter

Safety Car

Joined: Dec 2007

Posts: 3,616

Likes: 5

From: Sandhills of North Carolina

Quote:

Originally Posted by 94vettelover2

I had 2.59 gears to start with. Went to 3.07's with a 2800 stall and I now have 3.45's
Performance tune got me about 14 rwhp. RR's and LT4 springs got another 17. Headers, very little rwhp.3 but about 17 ftlbs of torque. EWP I'm not sure about but probably about 3-5. The cam was the biggie at about 38 or so. All of these numbers are approximate off the top of my head. I do have the dyno results for them though. There is also a K&N on the car with cut lid and a 160 stat.

IIRC my best time before the cam was 13.3 @ 103 or so in the summer of last year. My best after the cam was a 12.3 @ 109 in very good air last Feb. The last gear change to the 3.45 didn't gain me much for some reason but my 60' times are a steady 1.7 now.

Up until about a month or so ago I had Corsa exhaust on the car. Now I have the stock system back on with a X pipe in place of the resonator and electric cut outs if I want some noise. Very little if any loss from removing the Corsa.

I'm really excited to see what these heads are going to do!

Last edited by Weav's Vet; Apr 26, 2010 at 02:07 AM.

Apr 26, 2010 | 01:57 AM

#26

Weav's Vet

Thread Starter

Safety Car

Joined: Dec 2007

Posts: 3,616

Likes: 5

From: Sandhills of North Carolina

Quote:

Originally Posted by 96 lt-4

Much appreciated. I my take you up on that. I had gone to Garner before but I had issues with the engine and Brian at RPM couldn't do anything with it. I have all of that worked out now so I'm good to go after I get these installed.

Apr 26, 2010 | 02:24 AM

#27

tpi 421 vette

Melting Slicks

Joined: Mar 2002

Posts: 3,108

Likes: 126

From: S.L.C. UT

Hi Mike, With the new AFR 195's, you are going to gain at least 60 cfm, and that is with a port the same size as the LT4 head. And these heads will flow easily 40+ cfm more than a stock LT4 head. If you gain 60 cfm that is huge from your LT1 heads, and I am being very conservative. I think a LT1 head flows around 217cfm. And the AFR 195's flow 280 cfm in the catalog. And the low lift numbers would smoke a stock LT1 head. Just about everybody that has independently flowed the AFR 195's is seeing about 286 cfm. So you could reallistically pick up about 70 cfm. This is going to be a day/night difference. And the port volume isn't excessively huge either. It will feel like a different car!

And a nice thing about modern technology is 3+ years ago, the old AFR comp port heads would flow about the same as the new Eliminator street port heads. And the old AFR comp heads would have cost way more money than what the current street port heads cost now.

I think peak hp will be around 6200-6300 rpm.

This thing should run awesome!

Jim

Last edited by tpi 421 vette; Apr 26, 2010 at 02:32 AM.

Apr 26, 2010 | 02:31 AM

#28

Weav's Vet

Thread Starter

Safety Car

Joined: Dec 2007

Posts: 3,616

Likes: 5

From: Sandhills of North Carolina

Jim, you're making my day or should I say night.

That rpm/hp peak will fit perfectly with this cam I have. It's good to know too because I wasn't going to be very happy spinning this motor over that to achieve peak hp. Right now I'm at 5800 give or take at the traps.

Last edited by Weav's Vet; Apr 26, 2010 at 05:15 AM.