Camshaft question

[pabloconrad]

Would a Edlebrock 3790 camshaft designed for the 2.8L fit the 3.4L?

When ordering an upgraded camshaft, I used my old engine size not the new 3.4L

E-mail me with any answers.

Thanks in advance.

[Joseph Upson]

3.4L= rear wheel drive, 3400= front wheel drive. I believe the only necessity to install the hydraulic flat tappet cam in place of the roller cam is the pushrods from the pre roller cam front wheel drive engines but I'm not positive since the fixed set rockers may play a role also.

[torq455]

3.4 also can = DOHC and 3400 = roller cam, if you have roller lifters, you can't use the cam for the 2.8 unless you convert your roller lifters to flat tappet. different length pushrods are a must due to the different height between the two lifter types.

[Joseph Upson]

I could be mistaken but the badge names are specific when used in the technical manner that GM applies them:3.4L, 3.4 DOHC and 3400. I believe the problem is that most people generalize when using the terms and miss that the way GM uses those names is to indicate a physical difference in the engine relative to others similar two it, so those three titles are stamped in that manner only on the engines they are specific for, you will not find a factory; aluminum head motor with 3.4L on it, a cast iron head motor with 3400 on it or a 3.4L DOHC motor without DOHC on it. That's what I was trying to indicate to avoid the confusion that can result. Some people aren't aware that these engines are from a common denominator or that another other than what they have in their vehicle exists, surprising.

[torq455]

some people just don't know enough to know better. "I have a 3.4" well yeah but which one? they all are 3.4's technically by displacement. I just like to clarify before I give advice. Rather not waste my time giving advice to someone who has an engine different from what they stated.

[Superdave]

to put a flat tappet gen1/2 cam in a gen3 you'll need a gen2 timing set, flat tappet lifters probably stock gen2 pushrods (measure to be sure) and that should be it...

Honestly, i almost went that route by putting a 272 in my 3400 and going back to flat tappet but the advantages of a roller cam far outweigh the advantages of a little more lift.

just send in the stock 3400 cam for a regrind.. $170 to Comp for your custom specs. you'll need to order or find the right length pushrods which should be less than $90...

I've still got my regrind spec'd out for my 3400.... desktop dyno showes a 30 HP gain keeping the stock LSA.

[IsaacHayes]

I thought the gen2 cams wouldn't fit in the gen3 block because of something they changed...