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Old 03-08-2004, 03:38 PM
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Ignition and engine advice

Hi there

Thought I ask some advice and opinions about what kind ignition and mechanical parts you would suggest for my set up.

Base is 355 SBC with 10,5:1 comp ratio with 882 heads. Intake Torker 2 and double pump 650 Holley. I've been running with original HEI distributor. Cam was @ 050

BTDC 28
ABDC 56
BBDC 69
ATDC 25

Lift Int ,518 Exh ,541
Duration 309/319 solid lifters
Too rough it was, I know but got this brand new cam while trading it to used mild hydraulic cam

I have Comp Cams 12-704-8 mechanical roller cam and thinking to use it. It says on comp cams page that rpm range is 3000-6500rpm for this one. Need lifters and rockers for this and what else...cam button? bronze gear to distributor what else??

Gonna upgrade to AFR 210cc competition or race ready heads or if gets hard to get those, I'm thinking to choose Edelbrock Victor Jr. Which one you would suggest? Or do you have some others in mind?

So it should be:
355 SBC with that Comp Cams roller cam and hopefully AFR 210cc heads(comp ratio should stay about at 10,5:1), torker 2 intake, holley 650 DP. Crank and rods are stock with better bolts and bored last summer, so thinking to use max rpm around 6000-6500rpm or can I run more? Later, maybe next winter gonna upgrade to 383 stroker kit with REALLY good parts (wishing to run the engine up to 8000-8500 at summer 2005)

Then would need the ignition parts. Was looking after MSD parts like digital 7, but is that really worth the bucks? For the distributor I was looking MSD 85551. But what would you suggest? For the coil and for plug wires etc? Gonna need ignition box that has top rev. limit, starting retard, because even now engine was impossible to start with the timing it ran nicely. Oh and very strong ignition spark from low rpms is important in what the driving this engine is gonna see.

This engine goes to Formula Off Road Jeep. Formula offroad is sport from Iceland where we try to get up very steep sand hills. Strong torque engines seems to work great for this sport, so engine gotta response from 2500-3000 up to the max rpm. Gonna drive in the "softer" group (standard) first where paddle tyres and nitrous are not allowed. Other one is Special...but gotta practise before going there.

See some pics of some Formula Off Roaders from Scandinavia:
http://fjellasportracing.cjb.net/
http://www.4x4-racing.com/
http://www.fastfootracing.com/
http://hermodracing.com/
http://www.makioffroadracing.com/
http://www.evsatersel.se/rooster/
http://home.online.no/~jarstra/
http://home.chello.no/~lightfoot


Jare from Finland
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Old 03-08-2004, 07:30 PM
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I have a few suggestions;

First off, slow down, and ask your questions so they make sense.

650 CFMs is going to be way under carbed for what you are talking about.

You are going to need to do a lot more research to build the engine/s that you are talking about. It sounds like you want it to be one thing now, then something entirely different later. There is too much you will have to change in between. You will end up spending a fortune.

I suggest sitting down and really thinking about how you want your engine to perform. What is the real RPM range that it is going to run in? What will it idle like? How and when will you drive it.

Once you have a better idea of what you are building, you can start your research. You will need to do a lot or else your car will not run like it is supposed to. It will be slow, run like crap, and won't be fast in any powerband.

You can't just throw a bunch of go fast parts at a car and expect a miracle. If you spend the time to make the money to buy your parts, you better spend the time to research what to buy.
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Old 03-09-2004, 02:21 AM
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Quote:
Originally posted by lluciano77
I have a few suggestions;

First off, slow down, and ask your questions so they make sense.

650 CFMs is going to be way under carbed for what you are talking about.

You are going to need to do a lot more research to build the engine/s that you are talking about. It sounds like you want it to be one thing now, then something entirely different later. There is too much you will have to change in between. You will end up spending a fortune.

I suggest sitting down and really thinking about how you want your engine to perform. What is the real RPM range that it is going to run in? What will it idle like? How and when will you drive it.

Once you have a better idea of what you are building, you can start your research. You will need to do a lot or else your car will not run like it is supposed to. It will be slow, run like crap, and won't be fast in any powerband.

You can't just throw a bunch of go fast parts at a car and expect a miracle. If you spend the time to make the money to buy your parts, you better spend the time to research what to buy.
Sorry that English ain't my normal language (I'm from Finland), so it's hard to explain the question the way it would be easy to understand.

Actually I have the biggest problem to solve out the ignition system. So if someone could help with that. So what kind ignition box, distributor and coil I should use on 400-550hp range small block chevy in Off Road/Mud Bog racing. Engine is propably going to run up to 7500-8000rpm at for few seconds. And with few I mean like about 5 seconds. Or is original HEI distributor the best choice for this?

So any help for this question, please

Jare from Finland
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