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350 build up
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tirefryin_s10
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Joined: 03 Dec 2003
Posts: 70
Location: edmonton,alberta/canada
1925.12 points


1981 Mazda RX-7

PostPosted: Tue Jan 03, 2006 8:36 pm    Post subject: Reply with quote

my car ,was decent on the street ran fine no complaints,gas milage was terrible but thats all due to my driving habits,overall a great street engine -just remember my car is ALOT lighter then your vette
_________________
81 mazda rx7 V8 powered got my 12's too easy so now im hoping for 10's with the new 388 on spray -old combo-
Best et-12.59
best mph-114
on bald 235/60/15 street tires
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vettegofast
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Joined: 22 Jul 2005
Posts: 41

1049.94 points



PostPosted: Tue Jan 03, 2006 8:51 pm    Post subject: Reply with quote

Curb weight?
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tirefryin_s10
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Joined: 03 Dec 2003
Posts: 70
Location: edmonton,alberta/canada
1925.12 points


1981 Mazda RX-7

PostPosted: Tue Jan 03, 2006 8:52 pm    Post subject: Reply with quote

roughly 2500 lbs without me in it
_________________
81 mazda rx7 V8 powered got my 12's too easy so now im hoping for 10's with the new 388 on spray -old combo-
Best et-12.59
best mph-114
on bald 235/60/15 street tires
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vettegofast
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Joined: 22 Jul 2005
Posts: 41

1049.94 points



PostPosted: Wed Jan 04, 2006 8:53 am    Post subject: Reply with quote

My 84 Vettes about 3400 stock. Hopefully i can get it closer to 3000 with some Aluminum parts and shed the spare, etc.
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tirefryin_s10
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Joined: 03 Dec 2003
Posts: 70
Location: edmonton,alberta/canada
1925.12 points


1981 Mazda RX-7

PostPosted: Wed Jan 04, 2006 2:15 pm    Post subject: Reply with quote

i thought they were one of the heaviest vettes being close to 4000?
_________________
81 mazda rx7 V8 powered got my 12's too easy so now im hoping for 10's with the new 388 on spray -old combo-
Best et-12.59
best mph-114
on bald 235/60/15 street tires
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vettegofast
Member


Joined: 22 Jul 2005
Posts: 41

1049.94 points



PostPosted: Wed Jan 04, 2006 4:24 pm    Post subject: Reply with quote

Mines a C4. it has a fiberglass body. Maybe the steel ones?
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96capriceMGR
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Joined: 23 Aug 2003
Posts: 814
Location: New London Wisconsin
20327.88 points


1996 Chevrolet Caprice

PostPosted: Wed Jan 04, 2006 6:17 pm    Post subject: Reply with quote

My cam only iron head LT1 just put down 290hp at the wheels through an unlocked 2800 stall and before the last few minor mods had gone 13.2 at 4300lbs. This converter has a tendancy to hurt hp on the dyno but really pumps up the torque to the wheels like there was sustained 400+tq with a spike over 500 the only way that much hits the wheels with my mild 350 is the converter. These heads are equivalent to the gen1 Vortecs and the cam just a ZZ3 or ZZ4, whichever you prefer, crate motor cam. This is through a 4L60E(think 700R4 but computer controlled) and 8.5" rearend. In a much lighter car like you guys are talking about deep 12s should be just a matter of traction.
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tirefryin_s10
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Joined: 03 Dec 2003
Posts: 70
Location: edmonton,alberta/canada
1925.12 points


1981 Mazda RX-7

PostPosted: Wed Jan 04, 2006 7:47 pm    Post subject: Reply with quote

as far as i know EVERY vette was fiberglass,as for that motor workign good in a light car your damn right i would
_________________
81 mazda rx7 V8 powered got my 12's too easy so now im hoping for 10's with the new 388 on spray -old combo-
Best et-12.59
best mph-114
on bald 235/60/15 street tires
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View user's profile Send private message MSN Messenger
96capriceMGR
Member


Joined: 23 Aug 2003
Posts: 814
Location: New London Wisconsin
20327.88 points


1996 Chevrolet Caprice

PostPosted: Wed Jan 04, 2006 8:03 pm    Post subject: Reply with quote

I just mean it shouldn't take all that much to hit mid 12s in a light car.

Like I said my heads are flow wise equivalent to Vortecs, I do have reverse flow cooling allowing for 10:1 compression and 87 octane to work together on an iron head motor but with good quench that should work with regular Vortec heads and higher octane. The cam is 208/221 .474/.510 on 112(emmission compliant cam for some applications) before the headers it went 13.9 and the manifolds and cats kept it so quiet I could pass it off as a stock cam if I wanted that is how mild it is.

There is power to be had in more modern heads not just in flow but chamber design helping allow more compression and roller cams are a great thing too. People hotrodding older carbed stuff are almost always floored by the performance I get out of this thing, but my car is not unique or special, I just embraced technology rather than fought it. Before me on the dyno was a guy with a 95 Chevy truck he put aftermarket heads on it, a cam, aftermarket intake, couldn't figure out how to make the TBI work so he carbed it and put down 220rwhp Embarassed . Now that is same displacement, same axle, and if the original tranny same tranny.
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af2
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Joined: 01 Sep 2003
Posts: 5558
Location: grassvalley, ca
71227.76 points


1933 Willys Coupe

PostPosted: Wed Jan 04, 2006 9:10 pm    Post subject: Reply with quote

Hey, Did you see the Chevy high performance on a Ls motor that actually made more HP and Torque with a carb than with injection? Pretty interesting old school still works over new school.
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96capriceMGR
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Joined: 23 Aug 2003
Posts: 814
Location: New London Wisconsin
20327.88 points


1996 Chevrolet Caprice

PostPosted: Wed Jan 04, 2006 11:06 pm    Post subject: Reply with quote

Magazines are nothing but advertizing passed off as actual tests, so take their results with the whole shaker of salt not just a grain. That said I know on the LT1s the carbed intake results in a signifigant torque boost at some HP expense.
Correct me if I am wrong but the carbed LS1s still use computerized timing right? Might pick up some HP but bet the injection drives better.
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SMOKEmUP
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Joined: 30 May 2002
Posts: 3169

65097.54 points


1979 Chevrolet Camaro

PostPosted: Wed Jan 04, 2006 11:36 pm    Post subject: Reply with quote

tirefryin_s10 wrote:
as far as i know EVERY vette was fiberglass,as for that motor workign good in a light car your damn right i would

With the mph your car is trapping it should be running mid to high 11's with some traction.
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tirefryin_s10
Member


Joined: 03 Dec 2003
Posts: 70
Location: edmonton,alberta/canada
1925.12 points


1981 Mazda RX-7

PostPosted: Thu Jan 05, 2006 1:01 am    Post subject: Reply with quote

ya i know it had better times in it then what i got out of it but now i toasted the bottom end and the car itself is for sale,i am going to start working on a second gen asap
_________________
81 mazda rx7 V8 powered got my 12's too easy so now im hoping for 10's with the new 388 on spray -old combo-
Best et-12.59
best mph-114
on bald 235/60/15 street tires
Back to top
View user's profile Send private message MSN Messenger
vettegofast
Member


Joined: 22 Jul 2005
Posts: 41

1049.94 points



PostPosted: Thu Jan 05, 2006 8:59 am    Post subject: Reply with quote

I have an LPE book where he did an EFI vs Carb test on the same motor. With correct tuning, both induction systems made just about the same HP and TQ. Efi however would be more efficient and precise.

I may go carb cause its cheaper to implement, since the Vette wont be a daily drivers anyway. Just have to decide on the setup.
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SMOKEmUP
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Joined: 30 May 2002
Posts: 3169

65097.54 points


1979 Chevrolet Camaro

PostPosted: Thu Jan 05, 2006 12:15 pm    Post subject: Reply with quote

tirefryin_s10 wrote:
ya i know it had better times in it then what i got out of it but now i toasted the bottom end and the car itself is for sale,i am going to start working on a second gen asap

Why are you going with a second gen? IMO I like the first gen's the best.
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