I have got a 350 that I am putting performer RPM heads on and wanted to switch out the stock cam for something with more power. I am running a dual plane intake with a holley econojet 650 (spreadbore holley) and stamped 1.5 rockers. I ran an 1104 in my 400/vortec heads and it got horrible MPG.

I want a little more pep but at the same time want the best mileage possible. I preffer something that offers lower rpm power. what summit cam would you suggest?

 

You get what you pay for, spend a little more on a comp or lunati, i would use a 220-224 @050 duration cam for what you are requesting, i have used the summit and PAW cams, i killed the lobes on them both, just a suggestion.

 

roller or flat tappet?

I have just the cam for you if you need a flat tappet. it is a GM new still in tube.

I have a serious roller cam too new in box it is a comp cam.

let me know if you need specs

tappet cam=30 bucks
roller cam=150 bucks

plus shipping

Jeff

 

Flat tappet. what are the specs on it? got lifters for it too?

I have nothing but good success with the summit cams. Kinda spent all the $$$ on the heads.

 

The real help you need is choosing something other than a Summit cam.

XE262 for mileage, XE268 for a little more power.

 

Summit cams are made by Crane, at least they were a few years back...can't imagine they'd change suppliers...Just an FYI.

 

Doesn't really matter who grinds em, as there is a VERY SMALL universe of manufacturers of blanks.

The problem with the Summit cams is that they're copies of copied copies of cams that have been around since the late 60s that I know of; dating back to the times when you couldn't get any springs any better than stock ones. They have lllloooooonnnnnnggggggg lazy ramps, so they won't just snap GM valve springs in half; and are otherwise VERY outdated and obsolete. THe smaller ones (the "RV cams" of hot-rod lore) are OK, but the bigger ones SUCK compared to modern designs.

If you build 2 identical motors for one of these cars and put the Summit 1107 (which is also the Edelbrock "RPM" cam) in one and the XE274 in the other, I'd bet you'd see at least .3 second quicker times with the XE, and get easier tuning besides because it gives higher idle vacuum and overall better idle quality. And best of all, the difference in purchase price would be paid for within 4 tanks of gas by the XE's better efficiency, and after that, the XE cam will put money in your pocket for every mile you drive. Other MODERN cams will produce similar results.

I do not understand why people continue to put junk like that "RPM" cam in their motors; along with the "375 HP 327 cam" and all those other relics from the Civil War days. The cheeeep purchase price isn't worth the long-term cost.

 

If your rear gear ratio is less than 3.00:1 use summit number 1101. if its higher than 3.00:1 use summit 1102