Lifters?

[Blue6000se]

Hey guys i have a GM Performance Parts race cam, it's a hydraulic flat tappet cam and i was told i need to use flat tappet lifters. My friend told me that i could use flat tappet lifters out of a 93 firebird with the 3.4HO V6, is this true or could anybody point me in the direction where i could get a good set.

Thanks

[powerdoctor]

Did you change your valve springs ???

If not, I don't see why you could not use those lifters.

If you change your springs then you will need something different....

[IsaacHayes]

You are using a flat tappet came in a 3100sfi block??? Or a 3.1mpfi block?

[Barry]

Gm makes a performance cam for our motors?

[powerdoctor]

If thats his ride in the pic ( his avatar ) its a 3.1 mpfi.

He should be O.K. ... unless you know something I'm not thinking of ...

[powerdoctor]

Gm makes a performance cam for our motors?

Yes they do, visit the dealer and buy the book ....

[Blue6000se]

I have the springs and retainers that they recommend for it and it's going in my 3.4 block which is out of a 2001 Impala.
My car originally came with a 2.8Lmpfi but if anybody would like the part number it's P/N12363220 i'm told it's and off road cam which gave me a smurk so i bought it.

[19Cutlass94]

http://www.gmpartsdirect.com/performance_parts/store/catalog/Category.jhtmlCATID=172.html

[geoffinbc]

Yes you can use OEM lifters. In fact they are very good lifters. Better than a lot of the after market stuff that is made in China or other cheep labor countries.

But remember they have to be NEW lifters you can never re-use flat tappet lifters unless they go back on the same cam on the same lobe.

[Superdave]

Gm makes a performance cam for our motors?

they are made by Crane cams and sold by GM..

stock lifters would be fine for this application.


I'm more worried about these springs/retainers that they recommended. and more-so why you'd downgrade to a flat tappet cam in a gen3 roller block... You have MUCH better options these days.. That setup you bought was for the 3.4 iron head block.. lol

[IsaacHayes]

Yeah the 3400 impala is a roller hydrualic cam motor.... Not sure if you can use the old gen1 & gen2 tappet cams in there?

[Superdave]

Yeah the 3400 impala is a roller hydrualic cam motor.... Not sure if you can use the old gen1 & gen2 tappet cams in there?

Not sure what he'd do for pushrods, probably end up being custom length.. and he'd have to use a gen2 timing set.. eew...


the stock 3x00 cam is like .437 lift @ valve, the one you bought is .455in/.484ex with about stock advertised duration, hardly a performance cam at all.. I'd sell it ASAP and pick up a real performance cam. Honestly, you might actually lose power switching to that other cam.

the stage 1 or 2 roller cam in the WOT-Tech store would provide some serious gains..

[geoffinbc]

Might be close to stock advertised duration but I bet duration over .050 is a lot more. Which means a more aggressive ramp and more power. Stock cams usually have a conservative ramp in in order to make them quiet and also there is the emissions issue.

[ForcedFirebird]

Isn't that the 262?

EDIT: That actually looks more like a 272, can't remember the specs exactly for Crane.

Comp's 260 is 212*/212* .440/.440

Either way, it's not that bad of a street/strip cam, but the roller would be a much better decision for profile * but * you still have the dreaded Gen3 pin :P

[Superdave]

it's the Crane H260-2

http://www.cranecams.com/?show=browseParts&lvl=2&prt=5&Vehicle_Type=Auto&Cylinders=6&Engine_Make=CHEVROLET&Year=1986&Engine_Size=2.8-3.1%20L&partNumber=253901&partType=camshaft