help!!! 408 stroker
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Teching In
Joined: Jul 2015
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help!!! 408 stroker Hey guys I'm need g some help planning out my 408 please criticize. This motor will be going in a 2003 3/4 ton truck. I am wanting around 500 or 600 rwhp NA. I will be using L92 heads more than likely ported, I am not sure on a cam will I need new fuel rails or throttle body? Any suggestions will be help full is this possible and around what will it cost do do all this
TECH Fanatic
Joined: Aug 2009
Posts: 1,841
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From: Coast of San Mateo County Between Pacifica & HMB
600 RWHP from 408" NA in a truck!? HUGELY EXPENSIVE &
not practical. You would need at least 11.5 - 12.0:1 Compression
At least 6500-7000+RPM for peak HP Probably LLSR CAM and
A whole lot of other EXPENSIVE Details. 500 RWHP much more practical and daily drivable If that matters still not cheap. I would run the MMS 235s with a Ported FAST Truck manifold. Could reach low perhaps mid 500s with medium
Sized cam.
L92s need porting for sure and the just the right cam
Easier to mess up because once you port the L92 Heads you
Have ~280CC port sizes vs 235 for the same or less intake flow
And MUCH LESS exhaust flow so you need big split 8-12* minimum
Vs 4-6* with MMS235s as an example.
Do a search in the 408 results section, Study Well.
Good Luck
not practical. You would need at least 11.5 - 12.0:1 Compression
At least 6500-7000+RPM for peak HP Probably LLSR CAM and
A whole lot of other EXPENSIVE Details. 500 RWHP much more practical and daily drivable If that matters still not cheap. I would run the MMS 235s with a Ported FAST Truck manifold. Could reach low perhaps mid 500s with medium
Sized cam.
L92s need porting for sure and the just the right cam
Easier to mess up because once you port the L92 Heads you
Have ~280CC port sizes vs 235 for the same or less intake flow
And MUCH LESS exhaust flow so you need big split 8-12* minimum
Vs 4-6* with MMS235s as an example.
Do a search in the 408 results section, Study Well.
Good Luck
Thread Starter
Teching In
Joined: Jul 2015
Posts: 20
Likes: 0
600 RWHP from 408" NA in a truck!? HUGELY EXPENSIVE &
not practical. You would need at least 11.5 - 12.0:1 Compression
At least 6500-7000+RPM for peak HP Probably LLSR CAM and
A whole lot of other EXPENSIVE Details. 500 RWHP much more practical and daily drivable If that matters still not cheap. I would run the MMS 235s with a Ported FAST Truck manifold. Could reach low perhaps mid 500s with medium
Sized cam.
L92s need porting for sure and the just the right cam
Easier to mess up because once you port the L92 Heads you
Have ~280CC port sizes vs 235 for the same or less intake flow
And MUCH LESS exhaust flow so you need big split 8-12* minimum
Vs 4-6* with MMS235s as an example.
Do a search in the 408 results section, Study Well.
Good Luck
not practical. You would need at least 11.5 - 12.0:1 Compression
At least 6500-7000+RPM for peak HP Probably LLSR CAM and
A whole lot of other EXPENSIVE Details. 500 RWHP much more practical and daily drivable If that matters still not cheap. I would run the MMS 235s with a Ported FAST Truck manifold. Could reach low perhaps mid 500s with medium
Sized cam.
L92s need porting for sure and the just the right cam
Easier to mess up because once you port the L92 Heads you
Have ~280CC port sizes vs 235 for the same or less intake flow
And MUCH LESS exhaust flow so you need big split 8-12* minimum
Vs 4-6* with MMS235s as an example.
Do a search in the 408 results section, Study Well.
Good Luck
Thread Starter
Teching In
Joined: Jul 2015
Posts: 20
Likes: 0
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Either tow it there or see if you can get a break in tune flash to get the car up and running so you can slowly drive it to them..
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