Will this work good?

350, Iron Eagle heads, 180cc, 64cc, 2.02/1.94, Comp Magnum Cam 230/230 .512/.512 with 1.6 roller tip rockers, Performer intake and 600 carb. Th350, 3000stall, 3.42's. There are several nitrous'd and one turbo'd V8 in my area I want to be able to beat off the line and at a 30-40mph pull. Very few people here have an actual built engine, they just go straight to power adders and think their the fastest thing on the road.. A 150 shot may be in the future of this setup also, if neccesary. Im pretty much set on those heads, but if theres a better cam, let me know.

 

i'm not as knowledable as others but i'll try to give something worth listening to here.

I'm pretty sure, that the combo you have, NA, will work great. YOu might be able to use a tad bit less lift, as i hope the motor wont be spinning high enough on the street to use the extra lift.

When you goto a power added, as to my knowledge, you want an extra amount of lift in exhaust then intake, that way it'll flow the compressed intake air out more eficiently.

Heads are nice, especially for a 350, 180 would be a nice rev up to around 6200(effiencetly), if i can recall correctly on the flow charactoristics.

3000 stall seems a bit high, but if a hard launch is what you want, then thats certainly what you'll get. Again the cam matches well with that lift, it will have some power to get the car moving.



sorry man, after reading that it seems like i contradicted myself, yet when i read it over it doesn't. disregard anything that sound, ummm "stupid"



MTH

 

Loose the Performer and get a Performer RPM.

Also I hope you have headers and an exhaust...

 

Desktop Dyno comes out to 397Hp@6000rpm 385TQ@5000rpm. The RPM intake wouldnt realy help here. Small tube headers and y-pipe, bullet muffler exiting behind the rear seats. Torque is probably what I need most.

 

400 hp and you don't think an RPM will help over a regular performer?

O.K.

-Tom

 

If it made power past 6000rpm then the RPM would be better. I Desktop Dyno'd both of them. Not much of a difference under 4500rpm. Not worth spending $125 for a few HP. Better off putting it towords the nitrous.

 

HELLO!!!

First off, what Desktop Dyno are you using? You must have the new, improved (albeit expensive) version?

Second, what cam is that exactly? Is it the Magnum 280 with 110 LSA? Bad cam for forced induction and/or nitrous. Too much overlap. The gain in mid RPM torque from the nitrous will be lost out the exhaust pipe.

ManOfTheHour had the right idea as far as lift on the exhaust, but what helps more than lift is duration. A split pattern cam with a wider LSA will benefit an engine that uses nitrous or forced induction more than a single pattern cam.

Getting higher cylinder pressure isn't difficult with the aid of those items, but getting the increased volume of exhaust past the tinny exhaust valve and micro sized exhaust pipe takes a little more time (aka "duration"). And lift always helps in that situation.

Third, you're going to have a 3,000 stall TC yet you don't want to justify spending the extra money on HP above 4,500 RPM? That's where your engine will spend ~70 % of it's time when you're racing. Especially with a gear as high as (numerically lower) 3.42:1. Plus the RPM intake line has been shown in real world tests to increase power AND torque everywhere above 1,500-2,000 RPM in most engines.

BTW, what diameter tires where you planning on using?

 

Its the 280H cam. I know forced induction works better with a split pattern cam, but I want most of my power to be from the engine itself. If I think it needs a little more I could add nitrous since I have KB hypereutectics. Like I said, its for the street, low-end, stoplight to stoplight. A blower would be great for what I want but I dont have quite that much money to put into it. I know there has to be an all motor combo out there that can give me what I want! Dont know what tire size yet, definetly a D/R or slick though

 

Agree on ditching the intake, I personally would also get rid of the 600 Edelbrock carb with that set up. I could feel quite a bit of differance when I went from the 600 Edelbrock to a 650 Demon. You need your intake, carb, exhaust, ect to work with your cam selection, not become restrictions.

 

Forgot to mention that carb is definetly gonna be changed a little down the road. Its just gonna be used to get the motor running right now. Cam choice is my only real dilema here.

 

As I said, the thing to be most concerned with either forced induction and/or nitrous is the overlap. That cam has too much.

I know it's difficult to imagine, but using nitrous is very similar to forced induction. You're forcing more volume into the cylinder than it's able to take in naturally aspirated. By doing so you'll effectively force some of the intake charge out the exhaust valve at low - mid RPM (before the cam comes on to it's power range) with that much overlap.

The nice thing about using a cam that's "designed" for nitrous is the wider LSA makes it a great street cam. The flat torque curve, smooth idle, and better vacuum at idle you get with the wider LSA makes the engine very well mannered on the street AND takes full advantage of "the juice".

IIWY, I'd call Comp Cams and tell them what you have planned (short of street racing). They'll be able to help you better than I can.

It's just that I have a '71 Camaro with the Magnum 280 (exact same specs as yours) and the idle is OK, but could be smoother with a wider LSA. But then again, I don't drive mine daily either. AAMOF I haven't driven it since last June.

 

Exactly. I was hoping someone would back me up there.

-Tom

 

i would lose the 3000 stall. Well, if that is a 3000 flash stall. Even still, 3000 is a lot, it wont be very nice on the street with a 3000, it will feel very "sloppy". Try somethign lower like 2400 - 2600, you'd be suprised.

 

The reason I was thinkin a 3000 stall was because I could probably use more gearing, with a Th350 and 3.42's. So I figured I could just be able to launch at a higher RPM to make up for it. I had a cammed LT1 with a 3000stall 700r4 and 3.23's. Wasnt to quit off the line, but it was hard to get any traction, top end was nutz. Mabey I'll get lucky and find a blower or centrifugal supercharger for under $600