My forth gen will be sold and I plan to build a new motor for my iroc. I already have a complete motor out of an 89 iroc which is a 350. On this new motor I want to put a D1 procharger on it and possibly a shot of nitrous. I have done alot of searches and it seems everyone says you should get the whole bottom end forged. Does anyone know which parts would hold the power and where to get them. So far I have looked at cranks and GM seems to be the cheapest and callies and scat are the same.
Thanks for the suggestions,
Bryan

 

A while back I was I was in the same position of shopping for parts for my stroker engine. I ended up going with a Cola crankshaft. In my research i found that all of the crank company's buy blanks & do not mfg them theirselves. There are only a couple of manufacturers "in the US of A "who actually make the blanks and they sell them to the all of the various Companies. I did not choose scat because in my area quite a few people had failures with them (circle track & Drag racers & then I found they bought there blanks from overseas.
Cola & Callies use blanks made in the US.
I did not do much research on GM cranks , Sorry.
My engine builder would not build my engine if I bought a Lunati crank due to crank failures that he had seen from others using them. Callies have great cranks, but they cost a few hundred bucks more than Cola & that's just for name. When I called & talked with Cola they had been doing the machine work for Callies a few weeks earlier because they were behind. My engine builder races a super gas car & has never had a failure with a Callies or Cola crank in any of the engines he has built & he only uses Cola in his engines. I dont have Colas phone #, but you can find it pretty easy on the web & Raoul sp? is the crank guru with them to talk to, He's vere friendly & knowledgeable.

As far as prices I went thru Scoggin Dickey. They were aroune 50 bucks less thru them than all of the others that I priced.

Hope this helps, Bruce (70GTO)

 

lunati

 

u think i should go ahead and stroke it or not?
Thanks for the replies

 

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http://www.competitionproducts.com/

http://www.martelbros.com/cgi-bin/store/ws400CS.cgi

http://www.flatlanderracing.com/

http://www.strokermotor.com/

http://www.speedomotive.com/

Try and gather as much info as you can. Lots of guys are using stock cranks and rods with forged blower pistons with good luck, you only need the forged stuff if you plan on beating the crap out of it.

Search the forced induction section of camaroz28.com also.

 

You ask, so I'll give you my 2 cents worth!

I'm not familliar with the procharger that you mentioned , but I believe you are talking about either a blower or turbocharger. So to make a long story short you are possibly going to add 3 major horsepower increasers.
1-stroking the engine
2-blower or turbo
3-nitrus

If you were just going to stroke the engine by itself, you could buy a cast rotating assembly like the ones that are made by Eagle & build your engine & more than likely everything would prove to be very reliable. But when you add the shot of nitrus you get in the gray area of, "will it live or will it scatter"!
I'm not sure of the affects of a blower or turbo (never dealt with them) but they do add gobs of power & your bottom end must be able to handle the extra forces that it makes.

I imagine that the block that you have is a 2 bolt main?
Building a 2 bolt main block with a quality forged rotating assembly then adding the above 3 is IMHO a recipe for a expensive failure. So are you willing to spend the cash for machining the block to a 4 bolt main ( 4 bolt w/splayed caps would be the best), because by adding all of these you are going to need all of the strength in the block that you can get to compiment the forged rotating assembly or you would be better off going the cheaper cast route & trying your luck.
Really you need to decide what you really want and see what fits your budget. Then get ahold of of the manufacturers Such as Eagle, Callies, Cola, Scoggin Dickey & tell them what you have plans on building & then poll them to see what they suggest & compare the results.
Other factors that you will have to contend with are,
1-The type of Intake system, Carb or fuel inj.
2-The rpm range that the engine will rev
You will also probably need a set of good flowing heads & the compression ratio of the pistons will have to be calculated after you decide what combination you want to go with.
I know I didn't give you an answer to your ?????? , But they are answers that only you can make or otherwise you might end up with a box of parts that are mismatched or by scattering you new engine

Hope this helps, Bruce (70GTO)

 

After posting this I found a stroker kit on ebay all forged by eagle that was $1299 i believe. I will probalby keep an eye out for it when it comes back around this one had already ended. Do you think the block would hold good studded with the two bolt mains? I also already have the heads (AFR 195cc) also the nitrous is a maybe, for just incase the power isnt enough.
Thanks for the help
Bryan

 

There is a never ending debate when it comes to the arguement of 2 Vs. 4 bolt main blocks. A splayed 4 bolt is in theory the strongest. But there is a large difference in opinions when it comes to a regular straight 4 bolt main block & a regular 2 bolt. Some say the 4 bolt is stronger & others say it isn't since you loose meat out of the block for the 4 bolt style. I won't go there so you can do a search or poll others if you would like. As I stated before, what fuel induction are you going to be running?
If you are going to use a tpi which makes its HP & torqe @5500 rpm max range your 2 bolt will be OK in my opinion, but if you are running a carb with a high rpm camshaft you better look for something else.. Also , how hard are you going to be beating it over the back? If just occasionally it will be OK IMO, but if your going to the strip every weekend it will not survive.
By simply stroking you engine the 2 bolt will be fine with a cast rotating assembly add the nitrous and you will be pushing it, and IMO if you are going to spend the money for a forged assembly then go ahead & spend the extra and have your block machined to a splayed 4 bolt. One other note that I have been warned of, Nitrous is addictave, a 100 hp shot is Ok at first then you bump it to a 250 horse shot and so on & so on until you scatter it. My advice is to poll others who have a set-up similar to what you are wanting & see what they have to say.

Bruce

 

There was an article in hot rod magazine a while back i think nd they said that splayed main caps can actually cause stress fractures in the block and are actually not stronger than straight 4 bolt mains. They say that whenever possible it is best to get an original straight 4 bolt block. That is just what I read.

 

I'd Say this is your best bet. Good parts.

 

if your rinning tpi and afr'195's the sealing area of the intake gaskets is reduced as the heads have larger ports than the intake they work n/a but mine failed 4 times under boost. at that point the option was to have materal added to the intake or buy the 190's wich is what i did.
just somthing to think abouit.
pete