Iron ls1/prc 2.5 heads or 6.0/ls3 heads build - LS1TECH - Camaro and Firebird Forum Discussion

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Iron ls1/prc 2.5 heads or 6.0/ls3 heads build

Old 08-10-2018, 12:07 PM
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Default Iron ls1/prc 2.5 heads or 6.0/ls3 heads build

Hey guys, I'm back at it again. I'm getting close on pulling the trigger on my Iroc build. My goal is to be completely street driven,( about 475-480 hp flywheel) occasional track time if any. Something I could possibly daily drive with maximum 93 octane, but retain the street fun.. Something I could drive to car shows hours away...

Im looking to use stock internals, just a top end change. Intake, cam, heads,springs,etc... I plan on using a 4l80e trans most likely... 9 inch new ford rear or maybe Hawks 8.8... natural aspirated engine..

Which one of these builds would make a better decision

Gen 3 -Iron ls1/ls6 intake/prc 2.5 heads/aftermarket cam build or

Gen 3- 6.0 lq9 /stock ls3 intake & heads /cam aftermarket cam build

I already have a complete 4.8 & a 5.3 that I could de- assemble and rebuild

or I was thinking about getting a stage 1 6.0 shortblock here http://lsx4u.com/engines.html

Last edited by 86CAMARO400HP; 08-12-2018 at 05:12 PM.
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Old 08-10-2018, 01:21 PM
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Stock LS3 heads and cam?
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Old 08-10-2018, 01:46 PM
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Originally Posted by HCI2000SS View Post
Stock LS3 heads and cam?
aftermarket cams
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Old 08-10-2018, 02:46 PM
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Ok I see you changed that after I posted. Honestly both would have no trouble making 480 fwhp. If there is a fair price difference I'd go for the less expensive route. If we were talking 480 rwhp that would be different
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Old 08-10-2018, 03:35 PM
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6.0 with LS3 top end and custom cam.
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Old 08-10-2018, 05:53 PM
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BTW, NO such thing as an IRON LS1.
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Old 08-10-2018, 06:11 PM
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Originally Posted by G Atsma View Post
BTW, NO such thing as an IRON LS1.
lol. I know. I know. Sounds kool though, but you know what I meant!
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Old 08-10-2018, 06:13 PM
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Originally Posted by G Atsma View Post
BTW, NO such thing as an IRON LS1.

Which one would you go for?
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Old 08-10-2018, 06:48 PM
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Your goal go be achieved with eithier setup. Which one can you build cheapest is what I would do....
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Old 08-10-2018, 07:14 PM
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I would always go with the bigger displacement.
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Old 08-10-2018, 08:23 PM
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If I were to go with the 6.0 build , the heads and intake would be brand new. Not so much the same on the iron ls1. Just a thought that came to me
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Old 08-10-2018, 09:32 PM
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look into using a stroker rotating assembly for either build .check out TSP rotating prices .
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Old 08-12-2018, 12:15 AM
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I'd do PRC heads for a street car or LS3 heads for a more drag race oriented car.
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Old 08-12-2018, 01:27 AM
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Originally Posted by garygnu View Post
look into using a stroker rotating assembly for either build .check out TSP rotating prices .
really not financial able to go that route. I want to use stock internals
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Old 08-12-2018, 09:37 AM
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If money is an issue, and if you're wanting stock cubes and internals, I'd look into TSP heads. Places like TMS and Livernois seem to have good prices as well
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Old 08-12-2018, 12:00 PM
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Originally Posted by HCI2000SS View Post
If money is an issue, and if you're wanting stock cubes and internals, I'd look into TSP heads. Places like TMS and Livernois seem to have good prices as well
tsp as is Texas Speed ? TMS as in Thompson Motorsport?

If so I have been eyeing them both
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Old 08-12-2018, 12:02 PM
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Originally Posted by 86CAMARO400HP View Post
tsp as is Texas Speed ? TMS as in Thompson Motorsport?

If so I have been eyeing them both
Yes and yes.... BOTH good!
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Old 08-12-2018, 12:05 PM
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Originally Posted by 86CAMARO400HP View Post
tsp as is Texas Speed ? TMS as in Thompson Motorsport?

If so I have been eyeing them both
Yes exactly
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Old 08-12-2018, 02:24 PM
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Originally Posted by HCI2000SS View Post
Yes exactly
Yea I see. I probably will have to buy heads outright.. the 4.8 I have has the crack prone 706 heads and the 5.3 has the same I think...
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Old 08-12-2018, 02:26 PM
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Also I think the 6.0 shortblock that I might purchase maybe bored to a 370... if that changes anything
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