Corvette engine to F-body specs help..
Corvette engine to F-body specs help.. I've been looking for a F-body LS1 for my conversion, and haven't been too happy or successful with what I'vew found. I have however found a '00 'vette motor for a good price and low miles. What's different between the F-body and Y0body setups? I'm not worries about the accessories, and I definietly need to find an F-body oil pan, but is anything else different? Crank, flywheel mount, oil pickup? I'm assuming the pickup is...The help is appreciated!
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Joined: Dec 2004
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From: Baltimore, MD.
As far as I'm aware, most all of the internals are the same.
Some things I know are different:
Oilpan (duh), oilpump pickup, and windage tray
Accessories (including AC compressor & Harmonic Balancer)
Throttlebody should be electronic on C5, cable on f-body.
Harness is slightly different (because of throttlebody at a minimum)
Exhaust manifolds (obviously) but bolt pattern is standard.
Reasonably certain the camshaft is different (like different duration / lift specs, not fit function type different)
The crank & such should be the same, no real differences there. Flywheel / flexplate may be different, not sure on that.
If you do buy a complete 'vette motor with accessories and don't need the C5 accessories, PM me. I'd be interested in all of them (AC, Alt, PS, balancer, everything) if they're available.
'Dreamin'
Some things I know are different:
Oilpan (duh), oilpump pickup, and windage tray
Accessories (including AC compressor & Harmonic Balancer)
Throttlebody should be electronic on C5, cable on f-body.
Harness is slightly different (because of throttlebody at a minimum)
Exhaust manifolds (obviously) but bolt pattern is standard.
Reasonably certain the camshaft is different (like different duration / lift specs, not fit function type different)
The crank & such should be the same, no real differences there. Flywheel / flexplate may be different, not sure on that.
If you do buy a complete 'vette motor with accessories and don't need the C5 accessories, PM me. I'd be interested in all of them (AC, Alt, PS, balancer, everything) if they're available.
'Dreamin'
That's most of the info that I need. I definitely need the early style exhaust manifolds, harmonic balancer, and fuel rails with return (not sure what years had those though). I"ll let you know if I'm getting rid of the accessories (or even if I get this motor) Thanks!
TECH Resident
Joined: Dec 2004
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From: Baltimore, MD.
Your comment about fuel rails with return got me thinking about that subject for my swap. From some quick searching, it looks like there are 2 different ways to do this deal. Either run the early vette fuel rails (which I think limits you to '97-'98) and run 2 complete lines from tank to engine (the return type system) OR use the later 'Vette filter / regulator / return located somewhere close to the tank, and only run 1 line to the engine (no return needed). See the link below (its even got a pic and part number for the vette FRR).
https://ls1tech.com/forums/showthrea...el+rail+return
Personally, I don't see much benefit from running a return type system. Maybe somebody else can shed some light on the why that is preferred (if it is preferred).
And thanks for keeping me in mind for the accessories if you buy a vette motor with access.
'Dreamin'
https://ls1tech.com/forums/showthrea...el+rail+return
Personally, I don't see much benefit from running a return type system. Maybe somebody else can shed some light on the why that is preferred (if it is preferred).
And thanks for keeping me in mind for the accessories if you buy a vette motor with access.
'Dreamin'
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"Reasonably certain the camshaft is different (like different duration / lift specs, not fit function type different)"
I've been told the cams were the same as the f-body for the same years.
Where did you get this information?
I've been told the cams were the same as the f-body for the same years.
Where did you get this information?
TECH Resident
Joined: Dec 2004
Posts: 841
Likes: 0
From: Baltimore, MD.
Actually, we're both right, but it depends upon the year.
According to Will Handzel's book "How to Build High-Performance LS1/LS6 V-8's" the cams for certain years are the same. But for other years, they're different.
On page 46 there's a chart that list camshaft specifications.
The '01-'02 Vette & F-body use the same cam, PN 12561721, with 198/207 duration, and .467"/.479" lift on a 116 degree lobe centerline. Interestingly, the '01-'04 LQ4 & LQ9's (maybe later) also use that same camshaft.
All other years of vette and f-body uses slightly different camshafts. The duration, lift, and lobe separation numbers are very similar, but not exactly the same cam.
For example:
'98 f-body cam is PN 12557812, and is 198/209 .500"/.500" on 119.5 LSA.
'98 Vette cam is PN 12554710, and is 199/207 .472"/.479" on a 117 LSA.
Very similar, but not the exactly the same.
'Dreamin'
According to Will Handzel's book "How to Build High-Performance LS1/LS6 V-8's" the cams for certain years are the same. But for other years, they're different.
On page 46 there's a chart that list camshaft specifications.
The '01-'02 Vette & F-body use the same cam, PN 12561721, with 198/207 duration, and .467"/.479" lift on a 116 degree lobe centerline. Interestingly, the '01-'04 LQ4 & LQ9's (maybe later) also use that same camshaft.
All other years of vette and f-body uses slightly different camshafts. The duration, lift, and lobe separation numbers are very similar, but not exactly the same cam.
For example:
'98 f-body cam is PN 12557812, and is 198/209 .500"/.500" on 119.5 LSA.
'98 Vette cam is PN 12554710, and is 199/207 .472"/.479" on a 117 LSA.
Very similar, but not the exactly the same.
'Dreamin'
Last edited by 'JustDreamin'; Aug 28, 2005 at 08:29 PM.
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Originally Posted by JustDreamin
Your comment about fuel rails with return got me thinking about that subject for my swap. From some quick searching, it looks like there are 2 different ways to do this deal. Either run the early vette fuel rails (which I think limits you to '97-'98) and run 2 complete lines from tank to engine (the return type system) OR use the later 'Vette filter / regulator / return located somewhere close to the tank, and only run 1 line to the engine (no return needed). See the link below (its even got a pic and part number for the vette FRR).
https://ls1tech.com/forums/showthrea...el+rail+return
Personally, I don't see much benefit from running a return type system. Maybe somebody else can shed some light on the why that is preferred (if it is preferred).
And thanks for keeping me in mind for the accessories if you buy a vette motor with access.
'Dreamin'
https://ls1tech.com/forums/showthrea...el+rail+return
Personally, I don't see much benefit from running a return type system. Maybe somebody else can shed some light on the why that is preferred (if it is preferred).
And thanks for keeping me in mind for the accessories if you buy a vette motor with access.
'Dreamin'
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Originally Posted by JustDreamin
If you're within 2 feet, then yeah, there isn't much advantage (or space for the FRR unit either).
So, you've got my curiosity...Whatcha buildin'?
'Dreamin'
So, you've got my curiosity...Whatcha buildin'?
'Dreamin'
So instead I went out and bought a Pontiac Fiero (I know some of you are laughing....stop it) I ordered up the kit from V8Archie.com (excellent customer service and support) and now I'm just plannig all the little stuff like fuel, exhaust, pcm....the gas tank on the Fiero is under the center console and the engine is about a foot behind your head. Sounds like fun to me! Pics will be posted after I receive the kit and start disassembly. Went from a $20-25k expected cost to a $12-15k expected cost, including the price of the car. Think 400 rwhp in a 2800 pound car will get me mid 11s? That's what I'm shooting for. Oh, back on post topic, the kit calls for an LS1 with an f-body oil pan, early C5 exhaust manifolds and fuel rail as well as C5 harmonic dampner. I've only found C5 LS1s, so i'm trying to see how to get it in spec for what I need (no electronic trottle either). !rambling
fiero swaps are cool 
a rear mount app like that is one of the few times i would consider running the electric throttlebody... a couple wires is easier and more accurate to run then a cable/linkage setup around the car......
post up some pics when you get into it
a rear mount app like that is one of the few times i would consider running the electric throttlebody... a couple wires is easier and more accurate to run then a cable/linkage setup around the car......
post up some pics when you get into it
What is needed for the electric gas pedal? I'm assumung that it is a entire pedal assembly with all sensors and switches in one piece, with only one connector. Anyone have pics of the pedal? I haven't looked yet to see how the cable routed is routed.
