Small Block & Big Block Chevy Specific - looking to make over 500hp with pro comp 210 heads

I need some help coming up with a combination to go with my 350 4 bolt main block and pro comp 210 heads Im looking to make at or over 500hp on pump gas.

Sort of asking allot out of 350 cubes and heads that arent known to flow some real numbers.It might be possible with a 383 stroker.

It can be done but you are going to need a better head than that. I suggest looking into a Brodix or Trick flow head. You can even do it with an Edelbrock head. Chevy High Performance magazine did it awhile back. You are going to need a nice healthy cam and compression should be 10.5 or better.

afr 195s can get the job done with the help of a big ass cam.

High 590 or 600 lift roller cam, stroke the motor to a 383, RPM air gap, roller rockers, milodon or moroso pan, Electric water pump, holley double pumper 770CFM, 10-11:0 compression.

Here is a page from AFR's site:

http://airflowresearch.com/articles/article072/A-P1.htm

http://airflowresearch.com/articles/article054/A-P1.htm

It can be done but you are going to need a better head than that.

afr 195s can get the job done with the help of a big ass cam.

Here is a page from AFR's site:


He did not ask about other heads guys.


69camaro is right on track with what i was saying. It can be squeezed out of a 350 block, but stroking it up and getting all the ins and outs is a must, crank wiper and windage tray and all the works will be needed, unless you know a hell of a porter to get those cheap heads flowing better.

He didn't say about stroking it either

He mentioned a 350 block, not 350 ci.

By the time you get those heads ported (need about 280cfm at .600 lift), upgrade the springs for the cam you will need, get new guides for larger push rods...I think I would sell them and put the money towards some AFR's. Work out a budget before you jump in. That will help you make your decisions. I just built a 496 for my Monte Carlo. I thought I could save money by using the stock block and reworking the stock heads. By the time it was all said and done...I should have purchased a 502 crate!!

That is why i am building a 461, i was going 496, but the rotating assy alone was 1400$. I got a block that was bored over fresh, steel 454 crank, 990 square port heads, offenhauser intake, doe forged pistons and 7/16 dimple rods for 700$.

I will build more motor later, but for now the 461 is going to be fine.


Those heads will make you in the end with you would have gone with some Patriot heads, the pro comp line is not known for anything notable.

I scored a set of vortec heads, added screw in studs, springs, had the guides cut, all the works. A extra hundo after it was all said and done would have netted me a better head that would have yielded more power.

He did not ask about other heads guys.



he wanted a power number, those heads won't suffice. stroking isn't always ideal for big power . matching everything together would make the best power.i bet he could make 500hp with a 355 with afr's and a good sized cam like a xr294hr

Lets get the OP to get back on here and give us a lil more details on what he wants to use and what he wants to do.

i understand what he is doing, he has the heads. might as well use them. i got a set of brodix 180 iron killers for 500 bucks with matched intake and other shit brand new. so i am going to build a small screamer for daily abuse. heh

Yea, those heads are said to flow about what a vortec head does, and vortec heads are 170cc intake runner.

A 355 will make 425 with the right cam pretty easily, a 383 can get to about 450. So if he did all the other ins and outs, he can get close to 500, but it will take more than it is worth to get that number.

Yea, those heads are said to flow about what a vortec head does, and vortec heads are 170cc intake runner.

A 355 will make 425 with the right cam pretty easily, a 383 can get to about 450. So if he did all the other ins and outs, he can get close to 500, but it will take more than it is worth to get that number.


you can make close to 450 with a set of vortecs and the right cam. no need to stroke it.

425 is close to 450.

425 is close to 450.

what number would you rather have? :P

chevy high performance did a great build with those heads. everything new carb to pan costing 3200 bucks yielded 442hp and 452ft lbs

With the ported heads or untouched? I have seen to many vortec builds and you need to remember one thing, take engine builds with a grain of salt when it comes to the dyno numbers.

they were untouched.

Like i said,take magazine builds with a grain of salt when it comes to dyno numbers.

it would be the same exact thing as if someone on one of these forums builds a motor.

Sure it would be...

how is it so much different? some use off the shelf parts. if you use the same exact crap you should get the same results granted you have a good tuner or you know what you are doing.it would be pretty much exactly like reading what or how people do a build on one of these forums. they will pretty much be nearly close to each other granted people know what they are doing and don't cheap out on parts. the only thing a magazine has is probably better conditions than most people building out of their garage.

I am just saying they inflate numbers for the articles man.

vortecs are known for low-midrange tq primarily. anything over .500 lift cam wise is pointless in a stock casting. I wouldn't put them on anything larger than a 383, and the only way I would put them on a 383 is if I was building it for a 4x4 truck or something and was putting a low-mid range cam in it. They weren't designed for a high peak hp motor.

FYI, to the original poster, pro-comp heads are not high quality heads. Several people have had push rod alignment problems, head gasket and intake gasket sealing problems. I honestly don't think it is possible to build a reliable 500 hp engine with those heads, especially a 500 hp 350. I don't think it could be done with a 383.

I would run a Brodix IK 200 or an AFR 195 Eliminator head, along with a solid roller cam, and bump up the compression to around 11.5-12:1. Install a matching single plane intake and a mechanical secondary carb, and you should have a 500 hp 350. You'll probably have to spin it to 7,000 or 8,000 rpm to do so, but you'll have a 500 hp engine. Now, spinning it that high, you'll have to be sure that you have a well prepped short block that will withstand that kind of rpm. If you put a 3.75 stroke crank in and go to a 383, you could get away with lowering the compression down to pump gas levels and stick a hydraulic roller in it and make close to, if not over 500 hp, and have more torque too, without having to spin it so high. Personally, if I were going for a 500 hp small block, I would start with a 2 bolt 400 block and go from there. The extra cubes are going to help you out tremendously, especially in the torque department.

The 406 in my sig was built with AFR 195 heads, 10.5:1 static/8.1:1 dynamic compression, XE 284 comp cams hydraulic flat tappet cam, 1.6 pro magnums, super victor intake, 750 holley street hp mechanical secondary carb, eagle h-beams, 4340 eagle internal balance crank, and a mallory hei. The motor made 510 hp and 506 ft lbs of torque, and it accomplished this by 5500 rpm. IMHO, you couldn't ask for more for a 93 octane pump gas small block.

I am not at 500hp with my stock short block L98...but I am close (1/4 mile speed of 118 in a 3500lb car with driver). I have 10.1:1 compression, AFR 195 heads, 236/242, .600", 109LSA hydraulic roller cam, 1 7/8 headers into a single 3" exhaust and my intake is a mini ram. Replace the intake with a Victor Jr., an 850HP carb and bump the compression to 11:1 (the cam definitely wants more compression) and you should be real close. I shift at 6600RPM. More cubic inches will make all of this easier.

i understand what he is doing, he has the heads. might as well use them. i got a set of brodix 180 iron killers for 500 bucks with matched intake and other shit brand new. so i am going to build a small screamer for daily abuse. heh

You're right on, I'm sure. I am doing a similar build, collecting what I can based purely on value (bang for buck). My goal is a low cost, high quality build.

I think the OP is painting himself into a very tight corner, however. I believe that if your build is based upon a power goal, and that goal is relatively high, then really the power goal dictates that you are going to need to pick your parts pretty carefully. You can't just use whatever you can find cheap or whatever you have on hand and expect to hit a high power goal. The two ideas are not compatible.

I had a power goal with my budget build, but the goal was so moderate that it allowed me some leeway in parts selection. That allowed me to consider a wide range of parts that would still get me to my goal. It just so happened that I scored a set of extreme performance heads at a very low price, but my original goals didn't make that a requirement - just a nice bonus.

Anyway, you can't have it both ways IMHO. You can use what you have/whatever is cheap and get what you get for power, or you can set a high power goal and then choose very specific parts to achieve that goal.

David

in a perfect world we could all afford dart blocks and big ass afr heads and make 700 horse on pump gas for cheap :P


look for deals and build what you can :)