Best H/C combo for a built 408ci???????
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Teching In
Joined: Aug 2004
Posts: 25
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Best H/C combo for a built 408ci??????? I am looking around for a better H/C package for my 408. What are the best H/C for a 408. I know to get a bigger cam and some 6.0L heads but which ones?
(Current Setup)--->
6.0L iron KCM 408ci, Patriot Stage II 5.3L heads-shaved 15 thous.,TR227
(Current Setup)--->
6.0L iron KCM 408ci, Patriot Stage II 5.3L heads-shaved 15 thous.,TR227
Last edited by DH01Z28; Aug 21, 2004 at 09:13 PM.
I would call Patriot Performance and see if they will produce a 4.00 bore stage two ls6 head with the race port hand finish job. They will also sell you a custom grind cam for your 408.
Originally Posted by DH01Z28
I am looking around for a better H/C package for my 408. What are the best H/C for a 408. I know to get a bigger cam and some 6.0L heads but which ones?
(Current Setup)--->
6.0L iron KCM 408ci, Patriot Stage II 5.3L heads-shaved 15 thous.,TR227
(Current Setup)--->
6.0L iron KCM 408ci, Patriot Stage II 5.3L heads-shaved 15 thous.,TR227
Hoew much did this setup dyno?? I am in the same boat as you, I have a 408 with Absolute Speed Stage 2 heads that are choking my motor. My cam is bigger than yours, 236/242 .598/.610 114+4. Mine put down 454 rwhp and 460 rwtq on motor today and 528 rwhp and 573 rwtq on a 50 shot. I just want to see how mine compares with others that are close to mine.
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Teching In
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Originally Posted by RedReaper
Hoew much did this setup dyno?? I am in the same boat as you, I have a 408 with Absolute Speed Stage 2 heads that are choking my motor. My cam is bigger than yours, 236/242 .598/.610 114+4. Mine put down 454 rwhp and 460 rwtq on motor today and 528 rwhp and 573 rwtq on a 50 shot. I just want to see how mine compares with others that are close to mine.
My A4-built 4l60e, 3400 stall-dynoed 391 rwhp and 440 rwtq
but it is back in the shop, 3 of the pushrods have groves cut in them like the rocker arms are walking on them....also the rocker arms are hitting the spring its self.....the car is getting re dynoed next week...so hopefully I will see some more power after things gets figured out.....I really think some Stage III 6.0L heads will really wake it up though. Are your heads 5.3L? and are they milled? Last edited by DH01Z28; Aug 22, 2004 at 03:17 AM.
Yes... I have some input.. Check this out and then contact the vendor that saved me from another mistake. https://ls1tech.com/forums/dynamometer-results-comparisons/207131-back-request-my-fms-408ci-superstroker-dynosheet.html
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Here's a good one with some relevent tech:
https://ls1tech.com/forums/showthrea...ighlight=scale
That first recommendation looks money, it'll support the cubes without excessive wear on the valvetrain.
https://ls1tech.com/forums/showthrea...ighlight=scale
That first recommendation looks money, it'll support the cubes without excessive wear on the valvetrain.
These will wake up your motor
https://ls1tech.com/forums/showthread.php?t=208417
Also have a 245/250 Cam that was ground for them
https://ls1tech.com/forums/showthread.php?t=208417
Also have a 245/250 Cam that was ground for them
I have a set of Katech LS6 heads in stock right now that you might want to take a look at These things flow crazy in the mid range & do well up top also What size chamber are you needing? Thats also a key in figuring out what head to run. Give me a call & we can see what chamber you need & we can look at all the different options.
These things flow crazy in the mid range & do well up top also What size chamber are you needing? Thats also a key in figuring out what head to run. Give me a call & we can see what chamber you need & we can look at all the different options.
__________________
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
The LS6 style Patriots are definatley another option. Shoot me a email or call & we can look at what you need I have a nice 252 258 112 sitting here for ya LOL
Jason
I have a nice 252 258 112 sitting here for ya LOL Jason
__________________
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
Jason
Co-Owner, Texas Speed & Performance, Ltd.
2005 Twin Turbo C6
404cid Stroker, 67mm Twins
994rwhp/902lb ft @ 22 psi (mustang dyno) www.Texas-Speed.com
Thread Starter
Teching In
Joined: Aug 2004
Posts: 25
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Originally Posted by Jason 98 TA
I have a set of Katech LS6 heads in stock right now that you might want to take a look at These things flow crazy in the mid range & do well up top also What size chamber are you needing? Thats also a key in figuring out what head to run. Give me a call & we can see what chamber you need & we can look at all the different options.
These things flow crazy in the mid range & do well up top also What size chamber are you needing? Thats also a key in figuring out what head to run. Give me a call & we can see what chamber you need & we can look at all the different options.
). As for chamber size, I dont really know. I just want some high flowing heads (Stage III i guess )that wont bottle neck a 4.030 Bore, also I have inverted dome pistons with a depth of .105. As for my cam options, they seem to get narrower the more aggressive I want to go. With an A4 I am not wanting to go with a 112 LSA. I've had a 112 with the hotcam when my car was a cam only, and I hated it. My car hated it to, I had all kinds of computer problems with the traction control. And once I switched to a 114 all were gone. Can you get a T-Rex "style" cam with a 114 or 113?