98 ls1 vs newer years ?
98 ls1 vs newer years ? Looking at a 98 ls1 for my nova is there any good reason to stay away from the 98 motor and get a newer one?the deal at hand is on a 98 Z28/auto with 40K on it complete car $3,000 car was rear ended.The nova will see lots of track time.I know GM changed the motor slightly over the years but does it make that muck of a differance.Thanks for any imput.
Teching In
Joined: Jul 2005
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From: rochester ny
i have a 98 camaro with a 02 engine in it(******* before me blew the original engine) and i have the ls6 intake but i still have a egr....i just thought that was kinda weird
Yeah I heard the same thing thats why I put Katech rod bolts in mine,just in case I want to go with bigger cam(BIG)than what i have now.When my shop did the swap my bolts looked fine though. I think its when you go with a cam like an ms3 and spin it high that it becomes an issue. There is a guy here I think he goes by 98 mysticz who put in a ms3 in his 98 and his bottom let go.
Teching In
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From: huntington
Yeah I heard the same thing thats why I put Katech rod bolts in mine,just in case I want to go with bigger cam(BIG)than what i have now.When my shop did the swap my bolts looked fine though. I think its when you go with a cam like an ms3 and spin it high that it becomes an issue. There is a guy here I think he goes by 98 mysticz who put in a ms3 in his 98 and his bottom let go.
Sorry, I should have been a little clearer. if u do not plan on turning the motor over the factory rev limit (6200) then u really should'nt worry! oh and NO factory ls6 intake had egr, My car is a 99 and the dumbshit before me blew it up with only 26k miles it now has a 01 brand new, even has 243 casting heads but still has the damn ls1 intake and egr.lol
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Brett Foote
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if a 98 hasn't busted a rod bolt yet, odds are under normal rpm conditions, it's not going to go. Most of the rod bolt failures happened early on in the 98 lifecycle. Just don't mod your car to spin 7krpm and expect them to hold though.
I've had no issues spinning mine to 6500rpm and have done quite a number of passes getting to that rpm (100+ this year alone), on top of the occasional redlining it (6500rpm for me) on the highway.
Keep on top of maintenance, regular oil changes and an oil analysis from time to time will let you know how things are on the inside.
I'm more worried about my 10 bolt these days...
I've had no issues spinning mine to 6500rpm and have done quite a number of passes getting to that rpm (100+ this year alone), on top of the occasional redlining it (6500rpm for me) on the highway.
Keep on top of maintenance, regular oil changes and an oil analysis from time to time will let you know how things are on the inside.
I'm more worried about my 10 bolt these days...
although the '98 heads are the "worst", i think the only real difference is the way they cast the head. the port shapes are the exact same compared to the newer heads, the casting method was just different resulting in a little (maybe 5cfm?) poorer flow.
so i wouldn't base my decision on this.
i would however think about the fact that the '98's have perimiter bolt valve covers vs newer year's center bolt (more common) style.
so i wouldn't base my decision on this.
i would however think about the fact that the '98's have perimiter bolt valve covers vs newer year's center bolt (more common) style.
Looking at a 98 ls1 for my nova is there any good reason to stay away from the 98 motor and get a newer one?the deal at hand is on a 98 Z28/auto with 40K on it complete car $3,000 car was rear ended.The nova will see lots of track time.I know GM changed the motor slightly over the years but does it make that muck of a differance.Thanks for any imput.
https://ls1tech.com/forums/showpost....80&postcount=2
Us 98 LS1 owners have the pleasure of having...
Negatives...
Weaker rod bolts than 99+ LS1 engines
Lower flowing LS1 intake(10-15hp) 97-00 cars
Lower flowing heads (5-7hp difference at best)
Lower flowing exhaust manifolds than 00+ LS1's(3-7hp difference)
Less effiecent oiling system, Not a horrible flaw but still not as efficent as 99+ cars
and a lovely EGR valve attached to our intake
98 PCM is completely different from 99+ LS1's
Positives are ...
Slightly larger cam than 99+ LS1's (5hp difference at best)
28lb injectors
Throttle body opens faster(not much faster but faster never the less)
This is all off the top of my head. The link posted above goes into greater detail
My car has 131000 and runs like a champ no overheating, oil issues, nothing just whooping *** on the street daily.
Negatives...
Weaker rod bolts than 99+ LS1 engines
Lower flowing LS1 intake(10-15hp) 97-00 cars
Lower flowing heads (5-7hp difference at best)
Lower flowing exhaust manifolds than 00+ LS1's(3-7hp difference)
Less effiecent oiling system, Not a horrible flaw but still not as efficent as 99+ cars
and a lovely EGR valve attached to our intake
98 PCM is completely different from 99+ LS1's
Positives are ...
Slightly larger cam than 99+ LS1's (5hp difference at best)
28lb injectors
Throttle body opens faster(not much faster but faster never the less)
This is all off the top of my head. The link posted above goes into greater detail
My car has 131000 and runs like a champ no overheating, oil issues, nothing just whooping *** on the street daily.
Looking at a 98 ls1 for my nova is there any good reason to stay away from the 98 motor and get a newer one?the deal at hand is on a 98 Z28/auto with 40K on it complete car $3,000 car was rear ended.The nova will see lots of track time.I know GM changed the motor slightly over the years but does it make that muck of a differance.Thanks for any imput.
Also, the '98 motor cannot be bored more than 0.005". I have beat my motor and it runs good. The PCM does have some quirks about it that is a little trickier to tune. Nevertheless, it can be done.
You're probably gonna get a standalone type harness from painless or something. Just get one for a 99+ and use a 99+ PCM. That problem is now fixed. As for the heads. Probably not that big of a deal. IF you ever get a new set of heads in the future you'll need to buy valve covers and coil brackets. Again no big deal. As for rod bolts? Well if you are gonna keep the bottom end stock. Slap some katech bolts in there, and put on a new oil pump and problems are all fixed.
TECH Fanatic
Joined: Sep 2003
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From: St. Clair Shores Mi.
have a 98 and I have turned it to 6900 many times w/an f-13 cam for about 40k miles now. I didn't mean to rev that high but I found out my tack was a bit off recently looking back at some of my HP tuners log . The tach was off about 30-400RPM .
Yes the 98 was the worst head style , and had the bad oil pumps . But you will have the motor out just swap the pump .But for $3000 that sounds like a good deal for the whole car
Yes the 98 was the worst head style , and had the bad oil pumps . But you will have the motor out just swap the pump .But for $3000 that sounds like a good deal for the whole car
Teching In
Joined: Jul 2007
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to be honest i just developed a rod knock up my 98 ls1. i showed it a lot 0f races but i also did all required services (oil changes,coolant flushes etc.) so i did not go with a 98 ls1 for replacement but i went more expensive and got an ls6
Banned
Joined: Apr 2006
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From: Naperville, IL
LS1 and LS6 longblocks are the same price at SDPC.
