hey thanks for helping me with the timing. we tried going to 10 but it kinda misses. I think i can only go 8. There is probally many mile on the timing chain and has much slack. It as good enough to beat the mustang with 4.10 gears, I put new exhaust system. True 2 1/2 duals just before the axle, no muffler. It works well with the headers. Advanced the timing just a little, and took the front sway bar off. Launched pretty easy and pulled 2 cars off the line and was still going, but got off. not bad for an 82 firebird with intake carb and headers, with over 150 thousand miles. Cam has been order and on the way. Thanks for yalls help. <img border="0" alt="[cheers]" title="" src="graemlins/gr_cheers.gif" />

<small>[ July 30, 2002, 04:25 PM: Message edited by: Pro Stock John ]</small>

 

What cam are you putting in the 82 F-bird?

 

it has a 79 camaro 350, and I am putting a compXE 262H, going to port the heads, and change the springs with the cam kit.

 

XE262H is 218/224 (@.050) and 110 LCA, right?
Using 981 springs? This sounds like a reasonable cam. As far as the heads go, I'd just do some bowl work and a good valve job....but,

If you plan to spend more than about $500, consider upgrading to Vortec (L31 truck) heads. You'll need a new intake, like a Performer Vortec ($160) or RPM Vortec ($180). You could probably score the heads from a salvage yard. A valve job, slight milling and larger spring pockets should be enough. These heads are worth 30-50 hp over what your engine came with, even with moderate porting. The extra compression will help a lot, too.

My $.02

 

I think the duration is what you say but, the lift is .462/.469 1300-5600 rpm. My heads are going to be ported for free. I just spent my money for the cam. When I get another car to drive and more money i will put a bigger cam and rebuild the motor. Right now I think I am low 14's. I will try going to a track to know for sure what I run.

 

I would go with Old Stroker. The Vortec heads are even better if you can get them ported. Those heads are worth 250cfm @ .500 with a port job. The guy has to know what to touch and what not to touch but they would get a 350 up to over 400hp with that cam. The exahust is the same old porting but the intake is a little different.

If your gonna get heads ported you might as well start with a better core. The stock Vortec heads flow about 230cfm and they have a awesome combustion chamber and great swirl, both of those things will get you more power than your heads ported.

BASICALLY I'M TRYING TO SAY IS GET SOME VORTECS! THEY ARE THE BEST SBC BUDGET HEADS OUT THERE!

Bret

 

thanks. When I get more money I will probally invest on those heads. What do yall think about the World Products heads. Are those also a good investment?

 

For some good flow data, follow this link, then choose "Cylinder-head-flow-bench-database" and choose "Category 1 Small Block: Intake Ports Smaller Than 180cc"

Compare intake flows up to .500 lift. Vortec is even better that World Products, and most others.

Don't spend(waste?) money on more cam when you rebuild. Shop the junkyards for Vortec cores and use your new cam. I think you will be more than pleased (amazed, maybe), even if you don't do anything to the Vortec ports.

Around here on circle track iron-head racing engines the Vortec heads are outlawed because they are so good!

 

Moving to Internal Engine Section.

 

Well when I rebuild the motor I am going to go all out and build it for racing. It sounds like the heads are pretty good. I will invest on those. I want to be able to rev my motor to close to 7000 rpms, so my cam is going to need to be bigger so I can do that, but for now I will get those.

 

All bets are off at 7000. Why do you want to rev it that high? It's going to be difficult getting reasonable low and mid range torque and get power in the high 6000 range...especially without spending more $ that the total value of your car.

If your are looking for well over 550 hp, maybe 7000 is reasonable, but to make one that will work and live at least a while, $1/rpm is probably low.

Stick with 6000-6200 tops, unless your pockets are very deep. You probably have fewer than 300 hp now. 400-450 is relatively cheap, and not expensive.

My $.02.
Good luck!

 

Well I have a TH350 thats why I think 7000 is reasonable. Should I just invest in a 700R4? Where Would 400-450 HP get me? Do you anything about Nitrous? I think about using this sometimes so that why I can still be on the street?

 

Your current motor probably runs out of breath a lot sooner than 7000 with stock heads...

I second the Vortec/L31 heads... Box stock they might flow better than porting some late 70's stock smog heads...

I bet you can put a lot more timing in if you run premium gas that motor stock is what 8.5:1?

 

Its 8.5 compression. I use 93 octane,but as I went up on timing at idle it starts missing. I want tofix it up to rev to 7000. Everything is pretty much stock, just for headers, carb, intake. Now I have the cam and going to put it in this weekend with the springs. Where can I find these heads pretty cheap?

 

They come stock on a lot of 96-99 trucks, like my 99 Tahoe. My tahoe is rated at 280rwhp/330tq... and it runs 16.3@83.3mph and weighs in at 5000...

I'd try the salvage yards if not then also try SDPC our GM sponsor see how much they want.

You maybe also need a hotter ignition too if it's missing.

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by mcj82firebird:
<strong>Well I have a TH350 thats why I think 7000 is reasonable. Should I just invest in a 700R4? Where Would 400-450 HP get me? Do you anything about Nitrous? I think about using this sometimes so that why I can still be on the street?</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Your transmission doesn't determine what rpm to run the engine. The engine's ability to flow air determines where power is made (and not made).

What do you want to accomplish? If you want quicker 1/4 miles than a Z06, and don't want to spend a large bundle, re-build your 350 as a 383. SCAT sells a complete crank, pistons, etc. package for a reasonable figure. Use the Vortec heads, and don't EVER turn it past 6000. It'll make 450 or so horses and more torque than you can handle, and be all done about 5700 with the correct (not BIG) cam. It'll also live a long time and be a killer street car. Don't even consider twisting such an engine anywhere near 7. It'll gernade quickly. You'll spend more on the bottom end of a true 7000 rpm small block than you'll spend on this whole engine top to bottom. If you don't, you'll probably be building several botom ends!

If you really have to see 7000 on the tach, change the tach calibration! It's been done before...before you were born.

Nitrous is a lot like coke; gives a big high, addictive, but dangerous. Personally I'm not a N2O person. If I were, I'd build a bottom end that could handle it, however. That will cost more than the 383, as I said.

If your 350THM is strong enough, it'll be a killer with a 383. Hey, use a vacuum secondary Holley 750 or 850 on a RPM Vortec manifold, and it'll be a real sleeper. You won't have to run outrageous gears either.

My $.02. Hey you asked.

 

Hey Pro Stock I have an MSD ignition with the gap at .05 instead of stock .045. I will look around these next weeks for the heads. Hey OldSStroker how much does that kit cost. I am trying to get my motor at least 11 so that way I get get on the Street Board. And so I can be happy.

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by mcj82firebird:
<strong> Hey OldSStroker how much does that kit cost. I am trying to get my motor at least 11 so that way I get get on the Street Board. And so I can be happy.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Summit has an equivalent kit for $1100. Go to www.summit.com and search for part number SUM-CSUM383KIT. There's lots of info there. Check out all the stuff you get for the $1100.

I think Scat's is about the same. Summit buys parts, while Scat makes lots of their own, especially cranks. This kit is rated for 450 hp. Remember it's a new, not used cast crank, which is plenty strong. I wouldn't advise building a 450 hp "on the motor" and then squirting it with N2O. That's like practice bleeding.

If you are looking for 11's I think you'll have to ante up quite a bit more. "Speed costs money; how fast do you want to go". It's not a straight line relationship, either.

IMO, you should get solidly into the 12's with the 450hp 383 if you keep the car light and get the power down.

Keep you goals in line with your budget.

 

My car ways about 3100 with me in it so the 400-450 you think won't get me 11's. Even it gets me 12's N20 will get me 11's

 

My car ways about 3100 with me in it so the 400-450 you think will get me 11's. Even it gets me 12's N20 will get me 11's and I will be happy. At least I hope. I don't think that is to much money.