LQ 408 Stroker

[SilentTrouble]

I have done a bit of research on the internet and there are various budget build and build such but most were written 3-5 years ago. Parts are outdated new stuff has been developed 3-5 years is a lifetime at today's parts development.

I have an 01 Trans Am with an LS1 in it right now. I would like to drop in an LQ motor and make it a 408 stroker. Ideally I'd like to see 550ish HP for street/strip application.

As this is my first full engine rebuild I'll gladly accept any help and advice one can get from a forum. As far as parts go I can't make up my mind on what parts to get because I have a major inability to make a decision and pull the trigger without knowing I made the right decision.

I have my current LS1 for donor parts. sensors covers etc... I need to pointed in the direction of proven combos to achieve these numbers if possible... I just dont know what manufacturers are good any more. I just really need help making parts decision, developing a cost quote so I know what im looking at and pulling the trigger

[scott5]

There was an article in GM high tech not that long ago where they built a lq 408.

wesico stroke kit
L92 heads
FAST intake

[SilentTrouble]

wesico a good kit to pickup? I know sometimes various builds use specific vendors that may not be the best choice because they are "sponsors" I dont know much about wesico and their value/performance/reliability

[scott5]

I have used there pistons in all applications and like them alot. They are decently priced but I dont have any personally experience with them.

[mark21742]

Just remember the 60 extra cubes will really eat up camshaft duration, so you will want to look at larger duration came for a stroker than the cam choices for a stock cube 346.

I'm running a 255/263 .624/.624 115 lsa cam in mine and it has decient street manners.....also with larger cams youll have a later intake valve closing point so you will want to run a higher static compression to keep the engine snappy.....I'm running 12.5:1 static compression, but intake valve closes later in the compression stroke so I ended up with 8.25:1 dynamic compression.

[2001camaroSS]

My buddy did an LQ9 408 stroker last winter. I will get some info from him.

[TA98]

^^^^please do.

[2001camaroSS]

Its a 408 longblock 6.0 iron block bored .30 over (built by AES), trick flow heads 225cc, yella terra rockers, ARP head bolts, Eagle H beam rods, 11.8:1 comp, comp custom grind cam, and ls6 intake, kooks 1 7/8, ory, corsa cat, back full BMR suspension, strange 60.

Here's a video of it.

[mark21742]

^ sounds good!

I went with Mahle flat top pistons (-4cc valve reliefs), H beam rods, 4"crank, king bearings.
Had the 03 6.0 align bored, punched .030 over, and decked.
Hand ported my stock 241's, milled .040" off of them (this time) and valve job done....57cc chambers.
Comp cams 255/263 .624/.624 115 lsa cam
Edelbrock proflo xt (hand ported)
60lb motron injectors
FAST 90mm tb
Fuel cut set at 8,000 rpms now, and motor is still pulling hard when it hits fuel cut off