Just dynoed, where to now?
09-16-2013, 06:04 PM
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Just dynoed, where to now? Hey guys, just laid down some numbers with my 5.3L LM4 mild cam build 944 swap. Here are the specs and dyno:
- LM4 5.3L all aluminum engine
- Stock heads and bottom end
- TSP224R 224/224 LSA114 with hardened push rods and PAC 1218 valve springs
- LS1 intake, fuel rail, throttle body and injectors
- Custom long tube headers, 2.5" to single 3" Y, 2 straight through mufflers
What would be some cheap mods I can do at this point? I'd rather not touch the bottom end, but thought about decking the heads a bit to bump the compression up and possibly do a light port and polish on them. I was also thinking of looking for a LS6 intake, but they seem near impossible to find and expensive (aftermarket options are close to them price wise as well). Is there anything that I could be missing that could help a bit? Thanks!
- LM4 5.3L all aluminum engine
- Stock heads and bottom end
- TSP224R 224/224 LSA114 with hardened push rods and PAC 1218 valve springs
- LS1 intake, fuel rail, throttle body and injectors
- Custom long tube headers, 2.5" to single 3" Y, 2 straight through mufflers
What would be some cheap mods I can do at this point? I'd rather not touch the bottom end, but thought about decking the heads a bit to bump the compression up and possibly do a light port and polish on them. I was also thinking of looking for a LS6 intake, but they seem near impossible to find and expensive (aftermarket options are close to them price wise as well). Is there anything that I could be missing that could help a bit? Thanks!
09-16-2013, 06:24 PM
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Take the heads off and get them ported by AI...and grab an ls6 intake...only cost about $1500 all said and done, prob pick up 30-40hp easy
That cam seems a little big for a 5.3 as well, prob why your not hitting 300hp til 5k, but heads and intake will cure that...do you have 799 heads?
That cam seems a little big for a 5.3 as well, prob why your not hitting 300hp til 5k, but heads and intake will cure that...do you have 799 heads?
09-16-2013, 07:27 PM
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Take the heads off and get them ported by AI...and grab an ls6 intake...only cost about $1500 all said and done, prob pick up 30-40hp easy
That cam seems a little big for a 5.3 as well, prob why your not hitting 300hp til 5k, but heads and intake will cure that...do you have 799 heads?
That cam seems a little big for a 5.3 as well, prob why your not hitting 300hp til 5k, but heads and intake will cure that...do you have 799 heads?
09-16-2013, 08:07 PM
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sounds like your on the right track. ls6 intake for say $300 (or less), ls6 stage 1 or 2 heads, ported throttle body, UD pulley. you should pick up 30-40 rwhp and get better gas milage than me! cheers!
09-17-2013, 08:46 AM
#6
You should be able to get an ls6 intake for $350-400 shipped or less. Probably sell your ls1 intake for $100-150. It should pick you up 10-15 rwhp easy.
I would have went ahead and done 3" y to 3.5" single exhaust when you were doing that...probably not worth redoing now.
Heads would be about the next thing.
I would have went ahead and done 3" y to 3.5" single exhaust when you were doing that...probably not worth redoing now.
Heads would be about the next thing.
