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1 pair of Low millage Factory Corvette Aluminium 113 Heads heads with Competition cams guide plates 4808 675.00
These heads could be bolted straight on, no work needed on them. Just low millage take off. less then 40k miles.
1 pair of iron factory 1991 Camaro heads, these heads have 120k miles but have no known problems. 550.00
Both Heads removed from 5.7 liters engine.
The Iron heads have more millage, on them but otherwise, are a good set of factory heads.
Of course Price is obo,
I'm Not hurting for money, just cleaning out the garage of some good parts. Shipping is your cost, but I will help with all that is needed, on the shipping end as much as I can.
Plus this is a really cool way to look at the difference of these two factory heads !!
I will be on the road, about half the day tomorrow, but I will try and respond.. when I can !
These are the heads that were on my 1992 car, that I, run a 13.6 at 99.5 mph, with no headers, or intake work, & No roller rockers or cam.
They are off of a True 350 TPI, B4C 1LE car. And tho, a lot of people will say they are no different then a regular production 350 tpi head.
All the B4C 1lE cars I have ever seen all seem to run REALLY Good Numbers.
My car made 245 rear wheel hp. with these heads all stock..Soooo
I don't know.
These are the heads that were on my 1992 car, that I, run a 13.6 at 99.5 mph, with no headers, or intake work, & No roller rockers or cam.
They are off of a True 350 TPI, B4C 1LE car. And tho, a lot of people will say they are no different then a regular production 350 tpi head.
All the B4C 1lE cars I have ever seen all seem to run REALLY Good Numbers.
My car made 245 rear wheel hp. with these heads all stock..Soooo
I don't know.
What mods did you have? Ive never seen a stock Thirdgen ever dip into the 13s and I saw hundreds of them go down the track back in the 90s when they were still new or close to it.
These are the heads that were on my 1992 car, that I, run a 13.6 at 99.5 mph, with no headers, or intake work, & No roller rockers or cam.
They are off of a True 350 TPI, B4C 1LE car. And tho, a lot of people will say they are no different then a regular production 350 tpi head.
All the B4C 1lE cars I have ever seen all seem to run REALLY Good Numbers.
My car made 245 rear wheel hp. with these heads all stock..Soooo
I don't know.
I can’t speak for the times, but if I had to guess if there was any unadvertised power difference in the B4C/1LE cars it would be in the PROM and not in the cylinder heads. I don’t think Chevy had any special cast iron 083 heads reserved for those cars. In fact, I guarantee it.
The only stock 3rd gen I've seen run anywhere close to that is the 89 Turbo Trans Am. Your car must have had some work done to get 245hp at the wheels. That would put the crank hp near 300 hp and that would explain your 1/4 mile times.
Sure will. This is my 2nd one that was this fast. There is another member on here that has my old polo green 1992 B4C1LE, It went 13.8 so my white car is just a touch faster.
I never said that they were, Special Heads, But the fact that all 1992 B4c1LE came with "black valve covers" and the runners have a different casting to them, when all other Z28 had silver value cover and smoother runners..makes me think something was a little different, I mean that pretty odd. My car had 2 K&N filters, and maybe a smaller crank pulley. The pulley being the biggest mod, if i even had it at that time. Other then that, All Stock on some nitto drag radial that i drove with even on the street. That's all the explanation.
I have for ya !!
Well seeing that my 94 Hawk has black valve covers, and GM was already using them on the 92 Corvettes, maybe this is a little flair they threw at the 92 “special” cars? Maybe odd for them to do such a thing but after all it’s GM. And while small mods perhaps and on radials idk if I would consider that “stock.” Very impressive in any case for an L98 car and not debating the feasibility of it, just don’t believe there’s any performance gain there over any other 083 head. So many aftermarket options
Sure will. This is my 2nd one that was this fast. There is another member on here that has my old polo green 1992 B4C1LE, It went 13.8 so my white car is just a touch faster.
I never said that they were, Special Heads, But the fact that all 1992 B4c1LE came with "black valve covers" and the runners have a different casting to them, when all other Z28 had silver value cover and smoother runners..makes me think something was a little different, I mean that pretty odd. My car had 2 K&N filters, and maybe a smaller crank pulley. The pulley being the biggest mod, if i even had it at that time. Other then that, All Stock on some nitto drag radial that i drove with even on the street. That's all the explanation.
I have for ya !!
ALL 92s as far as ive ever seen had black valve covers , rough castings, and most of the time no TPI emblem sitting on top of the throttle body because they were the last of the run and GM was just running out of those valve covers and throwing left over Corvette runners and whatever they had left on these last TPI engines.
Only 92s I've seen with black covers, blank t-body, textured runners and newer oilpan (for low oil light on LT1s) came later in the year. The couple I pulled the oil pans off of also had powdered metal rods.
Yep, I know..I cant explain it perfectly either, I have been street/track racing cars for over 20 years..I'm not even close to knowing all the information out there.I can only report on what, I have seen and know honestly. I have nothing to gain one way or the other. I have owned mustangs and lots of different year iroc's and camaro's. I even had a friend who bought a 1993 b4c auto car 2nd hand with like 20k miles and it went 13.5-13.7 but with a better mile per hr. and we had a 1994 b4c 6 speed car, that was like 13.4 but it posted about the same miles per hr.better hole shot i think. So for me, b4c running a little better then most is not hard to believe.
@dmccain..I am proud, to show you your very 1st 1992 among many many 1992's with the silver valve cover, and smooth runners..I was just thinking that the black valve cover were a way to tell some engines from another in the plant..But this was just a thought, and i'm not saying in anyway it is a fact, but it would make sense.
Last edited by Gen1; 07-09-2020 at 01:12 PM.
Reason: add pic
That's a great looking engine and the first 92 ive seen with silver valve covers. Evidently a strong runner also @13.6 whatever minor mods you had. I think the 083s and 113s are both a decent head that's why I just had a set of 083s reworked instead of buying a set of aftermarket heads being im not trying to race the car or anything.
The 113 heads do have an angle to them, but it seems a little different from the iron heads, the 113 seems like the spark plug is right at the exhaust valve.
Yes.. I read that before, I posed the question..BUT..It says 2.00 and 1.56 stainless one piece valves, this is for there "Basic Package" But i didn't see any info on other packages, so i was just checking to see what yours were. Thanks.
Ah, ok. The add on is just the hand finishing of the ports and chambers. Mine are just the 2.00 and 1.56 valves. As far as I remember, they don't do bigger valve seats/valves because the payoff isn't worth the cost.
For giggles, I did a set of these AL heads years ago with 202 and 160 valves. Had problems keeping the valve seats in the heads (think machine shop screwed up) but they picked up .5-.6 tenths in the 1/4 over stock f-body iron heads..
I do love the AFR 180 I was looking at
part # 0918
I think, those would be the ones I would need or are a good choice..but at 1650.00
They ant cheap..lol
But, I have been thinking about them...a lot
This is a cool calculator I found while on-line it Calculate HP From Weight and MPH and a few other's.
So I put my numbers in to see what it would say, It was on the money.
Your Horsepower computed from your vehicle weight f 3300 Lb. & a MPH of 99.5 is 250.48 HP
I deiced to keep the Corvette Heads and have some work done to them, hear are a fer pic
old stock 113 heads valves 1.95-1.50 New 113 heads bigger valves 2.00-1.56
Sorry, I miss read, They should be Ferrea valve's ,But.. I'm glad you asked. I just got them back from the shop and did't check. I had them lightly ported mostly bowl work. I have some before and after flow numbers some where in all this paperwork.
07-04-2020, 12:47 AM
f 3300 Lb. & a MPH of 99.5 is 250.48 HP
