engine in blazer

[Terrybneal]

I pulled the engine out of my 88 s-10 pickup and put it in a 85 blazer. The blazer doesnt seem to have enough power to get out of its own way. I know it is because of the different rear end ratio. The truck had 3.73 and the blazer has 3.42.I went for a pretty long drive last weekend and got 13mpg,so I dont wanna change the gears.Im thinkin I need a milder cam.Here is a list of everything I have in the motor.

350sbc bored .060 over

stock heads with 3 angle valve job

lunati bracket master 2 cam(230/230° duration @.050\" lift, 292/292° advertised, .480/.480\" lift, 109

lobe sep)

670 cfm Holley street avenger carb

Mallory Comp9000 mechanical advance distributor

hedman headers

eldebrock airgap intake

turbo350 w/2800 stall torque converter.

I usually catch on to some things pretty quick, but have never understood the proper cam selection. I am looking at a comp cam268h.Is this gonna be a good cam for this engine?ANY SUGGESTIONS?

[ChevyKiD_69]

if was me i would run the one you put on here it is ok thumpy it does have a little bit of a thump to it. i think it would be the one i use. like me iam using a 290i 297 e on the duration 490 490 lift so if you ask me that is the one i would use on the power you want. maybe im wrong but thats just me good luck on your project. nick

[wild85]

I question the 109 lobe seperation on that cam. I wouldn\'t go any lower than 110 for the street. What is your compression? Is the block 0 decked? flat top pistons? I think your compression is too low for that cam combo.13 mpg is pretty shitty for that engine, I have a 357 with more compression, and a little more cam and get 19-21 highway, with 3.73\'s, th350 and 3000 stall. and 275/60/16 tires.

[Terrybneal]

Im not sure what the compression ratio is on the motor. I bought the motor already built. I do know it has flat top pistons

[Terrybneal]

maybe someone here can explain the lobe separation to me and the other cam specs.

[wild85]

Camshaft info (http://www.thirdgen.org/newdesign/tech/mods3.shtml)



hope this helps a bit

[grimpuppy]

If it is a street truck your cam is to big. The name should tip you off, bracket master. Bracket cams are made for mid range torque and up. They will feel lazy in a street car like you are experiancing. The 268 is a good cam but I think it is still a llittle to big for your motor. If you were to swith to the 3.73\'s you could get away with this cam. The 262 extreme energy cam I believe is the better choice for your gears. This cam will have excellent throttle response and will feel real snappy in your truck. It will make a lot more low end torque then you have now and will work really good with the smaller carb you have. Remember if you are street driving torque is where it is at. That is what you feel when you stomp the gas. Save the horsepower cams for your race rig.

[BrandOmatic]

i would say to get some good heads, and the cam will like it a lot better. it is a big cam for your application. with some smaller chamber, better flowing heads, i bet you\'d see a lot more power..

[grimpuppy]

You will see more power but better heads are not going to move the torque curve down to where he wants it. The cam is to big to an everyday driver. He mentioned he took it on a long trip so I assume he is looking for a good driver.

[BrandOmatic]

your right. just seems like the stock heads are the weakest link, plus a mis-matched cam. If he goes through the trouble of getting a cam perfect for his current setup, then gets some good heads someday, he\'ll hafta change cam\'s again to make use of the better parts.



btw.. best suggestion.. call comp cams... lol always the right answer =)



just be prepared to WAIT ON HOLD for awhile.