NA 600 crank HP combo ?
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NA 600 crank HP combo ? My Holley TBI is good up to 600 crank HP . I'm looking at upgrading to TFS as cast 220 cathedral heads on my LQ9 6.0 .
Later , If I upgrade from LQ9 , to a 415" LS3 bottom end , would 600 crank hp and 550 torque be attainable ? Using the 220 heads , Performer RPM dual plane, cam in the 230's , and 1-7/8 long tubes ? I could trim down the plenum , or add a spacer , but hood clearance is an issue.
Car is 3435# without me in it , 3600 stall , 350 gears . From some research , the 220 TFS heads will work well on the 364" and the 415" , but I'm always open to more suggestions to achieve my goal. Thank you .
Later , If I upgrade from LQ9 , to a 415" LS3 bottom end , would 600 crank hp and 550 torque be attainable ? Using the 220 heads , Performer RPM dual plane, cam in the 230's , and 1-7/8 long tubes ? I could trim down the plenum , or add a spacer , but hood clearance is an issue.
Car is 3435# without me in it , 3600 stall , 350 gears . From some research , the 220 TFS heads will work well on the 364" and the 415" , but I'm always open to more suggestions to achieve my goal. Thank you .
Last edited by 66-sd-BBB; Oct 10, 2014 at 04:27 PM.
Yes, 600 at the flywheel is very possible, which is around 500rwhp & 450rwtq. IMO, I'd go with larger heads(230cc) and a cam with at least a upper 230 intake duration in a 415 cu.in. engine.
BTW, very nice looking car!
BTW, very nice looking car!
Last edited by 99Bluz28; Oct 10, 2014 at 09:05 PM.
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Thanks ! I could have gone the usual BBC route , but a 500 rwhp stroker LS is enough for the street . And I like the small package it comes in . As it is , it's fun to drive , and will do pretty well at the track on a 100 shot. I emailed AFR about their 230 heads.
On my stock 4.00" bore , or do you mean a 4.030 " , if I went 408 stroker ?
If you're staying with the LQ9 block and bore in the 4.00-4.03 range then cathedrals all the way but something a bit bigger than the as cast 220s unless you plan on getting them worked. For a 415 with 4.065 bore ported LS3s will do the job.
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I could stick with this block and get a stroker kit for it ,but I'm not sure on the level of LSX experience, that my local machine shops have. Maybe I would save a few bucks, from buying a complete LS3 415" long block , and selling my complete LQ9 .
Or I could go half way for now , and step up the 6.0 lq9 with a set of AFR 230 v2 heads . I'm not sure how those would work with my 4.00" bore , cam , intake, and stall. The intake has good air velocity, and the cam is on the small side.
Or I could go half way for now , and step up the 6.0 lq9 with a set of AFR 230 v2 heads . I'm not sure how those would work with my 4.00" bore , cam , intake, and stall. The intake has good air velocity, and the cam is on the small side.
