3400 Heads

[LiL Grand Am]

What stage should I have done and who does good work at a fair price?

[H.O. Driver]

Your best bet is to have a local performance shop do it. Have them port & polish with a 5 angle valve job. Also have them do new stiffer valve springs. If you wanted to buy from a company I would go Dr. Speed. If you really are thinking about doing heads, get the mani's, larger tb and headers. You should get a dyno tune if you plan on this too. What good is having heads flowing more air then the rest of the motor can.

[99GrandAMSE]

... RSM :)

[LiL Grand Am]

Originally posted by H.O. Driver
Your best bet is to have a local performance shop do it. Have them port & polish with a 5 angle valve job. Also have them do new stiffer valve springs. If you wanted to buy from a company I would go Dr. Speed. If you really are thinking about doing heads, get the mani's, larger tb and headers. You should get a dyno tune if you plan on this too. What good is having heads flowing more air then the rest of the motor can.
Thanks for the Info.

[DowmaceWH99]

the RSM heads are supposed to be good, but I hear the doctor does them well too, probably another personal preference thing
www.rsmracing.com
www.doctorspeed.com


BTW 1000 post!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

[MJE95GAGT]

Originally posted by H.O. Driver
Your best bet is to have a local performance shop do it. Have them port & polish with a 5 angle valve job. Also have them do new stiffer valve springs. If you wanted to buy from a company I would go Dr. Speed. If you really are thinking about doing heads, get the mani's, larger tb and headers. You should get a dyno tune if you plan on this too. What good is having heads flowing more air then the rest of the motor can.

5 angle is overkill on the 3400 IMO. Much better off with a 3 angle. If you can't find a reliable local shop that has done work on previous 3400s (which is hard to find) then Dr. Speed is the way to go :agree:

[Pte Socks]

A three angle valve job coupled with stiffer springs ( like LS1 springs ) will do the trick.

[LiL Grand Am]

Ok if Doctor Speed is the way to go what do you think of there stage 2 heads .That is the set I am looking to put on this winter and having the computer reprogramed to remove the 106 top speed.

[99GrandAMSE]

... I'd simply have a local machine shop do the engine modifications ... no need to really to buy anything, just have your originals modified :)

[LiL Grand Am]

ok will do some checking around where i live. not a bad time 99grandamse.

[LiL Grand Am]

on the sam line whit portinting the heads . Does porting the MAF help that much?

[99GrandAMSE]

Originally posted by LiL Grand Am
... not a bad time 99grandamse.

Not the best; however, the engine was missing slightly (immediately prior to this run I installed my CAI and the car was adjusting to it), I missed shifting into third (hit the rev limiter twice) and I weigh 380 lbs :( ... I know, I know .. excuses, but, it all adds up to the fact the car should go quicker ... I am quite happy though for not having a 'whole bunch' done :)

[LiL Grand Am]

I did the same thing 2 weeks ago . I hit the the Rev limter twice. The first time it scared the shit out of me . The second time i hit at the line and hit a personal best of 15.208