Got the heads flow tested. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

sam's 72 · 04-10-2003, 03:39 PM

I took the heads to the machine shop last week, the guy called me today. At .500 lift, they flow 225 int. and 155 exh. I was looking for more then that, but will have to go with this! Should put the HP somewhere around 450 to 460, was looking for 500. Now I got to make a choice, either go with the heads I got or buy another set. If I buy another set they will be AFR'S !
Sam

SCOTI · 04-10-2003, 04:20 PM

How much have you spent on the current set (including purchase price)? What mods & casting #'s?

sam's 72 · 04-10-2003, 04:37 PM

I got right at $ 450.00 in them. They are 86 L98 vette heads, alum. with 2" intake valves and 1.55" exhaust valves in them, completely redone. New guides, valves, seals, springs, ported and polished.
I can't remember the casting number right off hand.
Sam

Project1970 · 04-10-2003, 04:46 PM

If $450 is all you've got into them total, I don't think I'd mind too much...what're a set of AFR's going for these days, especially aluminum ones?

sam's 72 · 04-10-2003, 04:59 PM

AFR'S is some where around $ 1000.00 to $ 1300.00
Depends on which ones you get.
Sam

Crank · 04-10-2003, 05:32 PM

Are those fuel injection heads? Will they work with a carb? That sounds awesome, I thought that AFR's were running about $2200, maybe I'm losing it, but they're pretty pricey.
Brandon

sam's 72 · 04-10-2003, 05:42 PM

No, they are not fuel injected heads. These heads came off of a L98 vette, 85' 86' carburated. When I get them back I will give you the casting numbers. They are nice heads, I was just wanting to get more HP out of them, they are good for TQ, this engine will be around 475 to 500 ftlbtq.
Sam

Crank · 04-10-2003, 05:46 PM

DAYUM. I'm not sure about half the stuff I say, so... lol. I could be wrong on some stuff. I wasnt sure if they were F.I. or not. Sounds kool, have fun. hehe
Brandon

sam's 72 · 04-10-2003, 05:56 PM

I called the shop, here is the numbers, and what Mortec say's
10088113...86-up...350..........Aluminum, 58cc, angle plug, raised
"D" port exhaust, 1.94"/1.5" valves
When I bought the heads, the guy had already changed out the valves in them, 2" int, 1.55" exh

Sam

bigjimzlll · 04-10-2003, 06:43 PM

The formula that AFR uses is. .257 x (max CFM) x (# of Cylinders) = HP potential.
.257X225X8=462.6 Thats max HP..if every thing is matched perfectly...AFRs 190 will only get you to 493

SCOTI · 04-10-2003, 07:17 PM

450$ total is a good deal. Sounds like it's going to be a nice package.

Project1970 · 04-10-2003, 07:25 PM

Um...all L98's were TPI engines. You can stick a carb intake on them no problem, though; Vortecs are the only GenI heads that need a special intake.

So technically, they're "fuelie" heads, in that they all came on a fuel injected engine originally...but you can run them either way.

sam's 72 · 04-10-2003, 10:42 PM

project 1970
I think you might have miss understood, they are 86 model, not 98. These head are not fuel injected heads, this was before they went to elec. fuel injection, 84 85 and 86 model vette's came with these stock, L98'S
Alum. heads
Sam

chevy2racr · 04-10-2003, 11:09 PM

if you got new heads you can get a Pro Action "pro lightening series" head the flows 300+ outta the box, if I'm not mistaken for like $900 bare. just an idea :-)

Project1970 · 04-11-2003, 04:00 AM

Quote:

Originally posted by sam's 72
project 1970
I think you might have miss understood, they are 86 model, not 98. These head are not fuel injected heads, this was before they went to elec. fuel injection, 84 85 and 86 model vette's came with these stock, L98'S
Alum. heads
Sam

'84 may or may not have used those heads, I don't know on that...

But even '84 was injected, even if it was the rancid dual-TBI crossfire setup. The L98 engine came out in 1985, with the tuned-port electronic fuel injection. It stayed more or less the same until the LT1 replaced it in the Corvette in 1992, and replaced it in the Camaro/Firebird in 1993.

lukecp · 04-11-2003, 10:29 AM

All corvettes with L98 heads were TPI fuel injected. I drove (and popped the hood) on a '86 with TPI.

sam's 72 · 04-11-2003, 11:06 AM

Well hell! I didn't know that. That is what I like about this board, you can learn something on here everyday! Thanks for clearing that up.
Sam

04-10-2003, 03:39 PM	#1
sam's 72 Senior Member Join Date: Nov 2001 Location: Pasadena, Texas, USA Posts: 1,005	Got the heads flow tested. I took the heads to the machine shop last week, the guy called me today. At .500 lift, they flow 225 int. and 155 exh. I was looking for more then that, but will have to go with this! Should put the HP somewhere around 450 to 460, was looking for 500. Now I got to make a choice, either go with the heads I got or buy another set. If I buy another set they will be AFR'S ! Sam __________________ 72 LWB chevy truck. Pasadena, Texas Last edited by sam's 72; 04-10-2003 at 03:41 PM.

04-10-2003, 04:20 PM	#2
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 22,031	How much have you spent on the current set (including purchase price)? What mods & casting #'s? __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*

04-10-2003, 04:37 PM	#3
sam's 72 Senior Member Join Date: Nov 2001 Location: Pasadena, Texas, USA Posts: 1,005	I got right at $ 450.00 in them. They are 86 L98 vette heads, alum. with 2" intake valves and 1.55" exhaust valves in them, completely redone. New guides, valves, seals, springs, ported and polished. I can't remember the casting number right off hand. Sam __________________ 72 LWB chevy truck. Pasadena, Texas

04-10-2003, 04:46 PM	#4
Project1970 14.1 @ 96MPH Join Date: Jul 2001 Location: Mesa, AZ Posts: 2,811	If $450 is all you've got into them total, I don't think I'd mind too much...what're a set of AFR's going for these days, especially aluminum ones? __________________ Project1970 - LS1 Swap Complete!

04-10-2003, 04:59 PM	#5
sam's 72 Senior Member Join Date: Nov 2001 Location: Pasadena, Texas, USA Posts: 1,005	AFR'S is some where around $ 1000.00 to $ 1300.00 Depends on which ones you get. Sam __________________ 72 LWB chevy truck. Pasadena, Texas

04-10-2003, 05:32 PM	#6
Crank Registered User Join Date: Aug 2002 Location: Crittenden, KY Posts: 1,965	Are those fuel injection heads? Will they work with a carb? That sounds awesome, I thought that AFR's were running about $2200, maybe I'm losing it, but they're pretty pricey. Brandon

04-10-2003, 05:42 PM	#7
sam's 72 Senior Member Join Date: Nov 2001 Location: Pasadena, Texas, USA Posts: 1,005	No, they are not fuel injected heads. These heads came off of a L98 vette, 85' 86' carburated. When I get them back I will give you the casting numbers. They are nice heads, I was just wanting to get more HP out of them, they are good for TQ, this engine will be around 475 to 500 ftlbtq. Sam __________________ 72 LWB chevy truck. Pasadena, Texas

04-10-2003, 05:46 PM	#8
Crank Registered User Join Date: Aug 2002 Location: Crittenden, KY Posts: 1,965	DAYUM. I'm not sure about half the stuff I say, so... lol. I could be wrong on some stuff. I wasnt sure if they were F.I. or not. Sounds kool, have fun. hehe Brandon

04-10-2003, 05:56 PM	#9
sam's 72 Senior Member Join Date: Nov 2001 Location: Pasadena, Texas, USA Posts: 1,005	I called the shop, here is the numbers, and what Mortec say's 10088113...86-up...350..........Aluminum, 58cc, angle plug, raised "D" port exhaust, 1.94"/1.5" valves When I bought the heads, the guy had already changed out the valves in them, 2" int, 1.55" exh Sam __________________ 72 LWB chevy truck. Pasadena, Texas Last edited by sam's 72; 04-10-2003 at 06:04 PM.

04-10-2003, 06:43 PM	#10
bigjimzlll Senior Member Join Date: Dec 2001 Location: Redding,CA...USA Posts: 4,736	The formula that AFR uses is. .257 x (max CFM) x (# of Cylinders) = HP potential. .257X225X8=462.6 Thats max HP..if every thing is matched perfectly...AFRs 190 will only get you to 493 __________________ It's called "drag racing" if they called it "tic..tic..WHAM!..BANG! F*&K!!!", they'd have to keep the magazines under the counter with the other men's publications click the clicky to join the site.... http://67-72chevytrucks.com/vboard/payments.php 67 lwb..first hotrod in 25 years..540 best ET is 9.45 @ 141.44 Anderson,CA

04-10-2003, 07:17 PM	#11
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 22,031	450$ total is a good deal. Sounds like it's going to be a nice package. __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*

04-10-2003, 07:25 PM	#12
Project1970 14.1 @ 96MPH Join Date: Jul 2001 Location: Mesa, AZ Posts: 2,811	Um...all L98's were TPI engines. You can stick a carb intake on them no problem, though; Vortecs are the only GenI heads that need a special intake. So technically, they're "fuelie" heads, in that they all came on a fuel injected engine originally...but you can run them either way. __________________ Project1970 - LS1 Swap Complete!

04-10-2003, 10:42 PM	#13
sam's 72 Senior Member Join Date: Nov 2001 Location: Pasadena, Texas, USA Posts: 1,005	project 1970 I think you might have miss understood, they are 86 model, not 98. These head are not fuel injected heads, this was before they went to elec. fuel injection, 84 85 and 86 model vette's came with these stock, L98'S Alum. heads Sam __________________ 72 LWB chevy truck. Pasadena, Texas

04-10-2003, 11:09 PM	#14
chevy2racr So Many Ideas, So Little Money Join Date: Sep 2001 Location: Marshalltown, IA Posts: 1,610	if you got new heads you can get a Pro Action "pro lightening series" head the flows 300+ outta the box, if I'm not mistaken for like $900 bare. just an idea :-) __________________ 72 Blazer 3/4 ton running gear 4.10s NP205/TH350 350 4in lift half doors 71 C10 with 454 99 S-10 5.1L SBC 700R4 09 Malibu Marshalltown, Iowa

04-11-2003, 10:29 AM	#16
lukecp Formerly yellow72custom Join Date: May 2001 Location: Austin, TX Posts: 7,531	All corvettes with L98 heads were TPI fuel injected. I drove (and popped the hood) on a '86 with TPI. __________________ '72 Chevy C10 Mild 350/TH350/3.07. Ochre/White. Old high school ride. '70 GMC C2500 '62 327 4bbl/SM465/4.56-geared Dana 60. White/White. Project or parts truck. '97 Saturn SL DD. 1.9/5-speed. 40+ highway mpg



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04-11-2003, 11:06 AM	#17
sam's 72 Senior Member Join Date: Nov 2001 Location: Pasadena, Texas, USA Posts: 1,005	Well hell! I didn't know that. That is what I like about this board, you can learn something on here everyday! Thanks for clearing that up. Sam __________________ 72 LWB chevy truck. Pasadena, Texas

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