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1998 trans am power

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Old 09-20-2012, 01:52 AM
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Question 1998 trans am power
I was wondering about how much power a 98 ls1 would hold in my trans am kno the computer is different but what else I think heads are and I've herd the bearings are weak but Idk please help
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Old 09-20-2012, 06:11 PM
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I believe their 328-333 hp stock
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Old 09-20-2012, 06:26 PM
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Yea but I've herd the blocks are weak on holding power along with the bearing I didn't know if it was true or not and since the heads are different could I put aftermarket heads on them
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Old 09-20-2012, 06:54 PM
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They're going to be nearly the same power-wise as every other year. It should be in the 335-350hp range. The rod bolts are the weak link in the '98s.
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Old 09-22-2012, 05:43 PM
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How much hp can you put down before having to worry about the rod bolts
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Old 09-22-2012, 05:57 PM
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I think its more about rpm than power.
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Old 09-22-2012, 06:01 PM
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^Agreed. These motors have been pushed time and time again beyond 500rwhp without a problem. Of course we have had success pushing them much much harder.
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Old 09-24-2012, 10:44 PM
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Yep. Watch out for those stock valvesprings at high rpm.
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Old 09-27-2012, 06:30 PM
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Was that 333hp at the crank or rear wheels?
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Old 09-27-2012, 08:20 PM
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Crank
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Old 09-28-2012, 08:52 AM
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Well that's good then, I just had 99 T/A ws6 dyno tuned yesterday and it was putting out 320wrhp
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Old 09-28-2012, 10:10 AM
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Originally Posted by DavidGarcia
Was that 333hp at the crank or rear wheels?
Stock LS1 cars make ~350hp crank, and will dyno anywhere from 290-320 RWHP stock.
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Old 10-12-2012, 09:16 PM
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Another question I understand 98s have different heads can I put ls6 heads on with no problem
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Old 10-14-2012, 10:50 AM
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Yes they will bolt right up. Might as well have them ported before you get them installed.
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Old 10-14-2012, 11:52 AM
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Originally Posted by why87
Yes they will bolt right up. Might as well have them ported before you get them installed.
As the 98's have the perimeter bolt valve covers, you'll need to move to the later center bolt covers to accommodate LS6 heads. The ignition coils are bolted to the cover differently.
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Old 10-15-2012, 07:23 AM
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Couldn't I just get different valve covers off a newer ls1
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Old 10-15-2012, 08:43 AM
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Originally Posted by wildryno 69
Couldn't I just get different valve covers off a newer ls1
Yes, you have no choice, you'll need the later valve covers.

You'll also need the ignition coil mounting brackets.
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