Help with cam selection

[trebec]

Hey folks. I remember reading of a member who sells cam selection advice for about $35, but it's free advice if you buy the cam from him. Anybody have contact info for this person?

Cam is for a 2.8l to 3.4l swap in an S10 with 3500 heads and intake. Will I have a choice between flat-tappet and hydraulic roller? Engine will be n/a daily driver. I have not bought pistons yet. Any suggestions?

[geoffinbc]

If your using the GenI block end then you are only going to be able to use a non roller cam. All of the available cams are listed here http://members.shaw.ca/howto/camshaft_guide.htm For you a COMP or Crane 260 Cam should fit the bill. If this is a 4X4 then you might want the COMP 252 cam for a little more low end grunt at the expense of some top end RPM.

[trebec]

No 4x4. Block came from a 93' camaro.

[trebec]

And I was going to try to use the computer from the camaro to run the engine. I know they are not able to tune, but it's what I have.

[trebec]

If your using the GenI block end then you are only going to be able to use a non roller cam. All of the available cams are listed here http://members.shaw.ca/howto/camshaft_guide.htm For you a COMP or Crane 260 Cam should fit the bill. If this is a 4X4 then you might want the COMP 252 cam for a little more low end grunt at the expense of some top end RPM.

Do you have a similar chart for 93-95 3.4l sfi camaros?

[SappySE107]

We used to have the service but it is no longer listed on WOT-Tech. We have speced a street/strip cam for the flat tappet engines running the 3400 or 3500 top end, but anything can be designed based on your engine build and application. 3400 pistons would be just over 9:1 compression, which isn't a bad thing if you want a lot of miles out of the engine. 3.4 pistons are about 12.5:1 I believe, with the .060 gasket. 13.4 with .040? Hell we have a calc on the site but im pretty sure those are close figures. Custom forged pistons are available, but that is likely out of the question.

[geoffinbc]

The cams on the chart will all fit the Camaro engine. The only thing you have to check when running SFI is if the cam sensor trigger is cast in the cam. I believe the COMP cams have it but don't quote me you better call or get pictures. If your running TBI or MPFI then all the cams will work.

[trebec]

Ok. Great. Thanks

[caffeine]

And I was going to try to use the computer from the camaro to run the engine. I know they are not able to tune, but it's what I have.

What do you mean they are not able to tune? They're one of the cheapest computers to tune.

[Superdave]

93 Camaro is OBD1.5 ( :P Robert).. You can tune them but it takes a little more effort I believe.

Probably easier to run it on a '7730 or a Megasquirt.


3.4 pistons, .040 gaskets and 3500 heads is 12.34:1, and 11.57:1 with .060 gaskets
3400 pistons, .060 gaskets and 3500 heads is 9.16:1... can't run thin gaskets with 3400 pistons

[trebec]

Thanks for the help everyone. I'm not sure what I will use to tune it, haven't got to that point yet. Still shopping for a cam. Forget the 3500 top end or that it is going in an S10. Can anyone recommend a cam or place to buy a cam for a 3.4l camaro?

[3400-95-Modified]

Lots of support for 93 LT1 stuff but it stops at 92 for the F car with the V6, on tunercat at least.... Jet Performance bought out Tunercat with their OBDII support, they list a 94-97 interceptor but I thought there was more 93-95 camaro tuning support... similar to that of the new Beretta support for OBDI.5.

If the ECU number is the same as the Beretta's this may help

http://www.madtuner.com/index.php?page=shop.browse&category_id=40&option=com_virtuemart&Itemid=26&vmcchk=1

[caffeine]

TunerCat released support for the 93-95 3.4 PCM a couple years ago. You can either buy Winflash and use Tunerpro with Robert's definition file or you can buy the full Tunercats program. I've flashed them before. Tuning wise it's about the same as a 7730 except the flash process takes a few minutes. But it's cheaper because you only need a cable and Winflash ($20) vs buying a chip burner or emulator

[trebec]

What would be the cheapest way to run it?; 88' S10 computer, 93' Camaro computer, or something else? The S10 is OBD 1, right? and the camaro OBD 1.5? I am trying to do this as cheap as possible so I was thinking to run the camaro electronics and tweek the fuel pressure or timing a little to make it run right. Would rather not shell out the money to have someone else tune it like my 2002 ls1 camaro. But that is completely different system, right? OBD 2? How does "megasquirt" work? Can I tune it and make changes myself?

[caffeine]

For under $100 you can be tuning the 93 Camaro PCM properly yourself, plus you get to keep SFI. No messing with fuel pressure or timing.