LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

What crank to run for 450hp N/A LT1 and 300shot?

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Old Jan 16, 2004 | 06:35 PM
  #16  
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Re: What crank to run for 450hp N/A LT1 and 300shot?

Originally posted by N2OpwrdTA
Hi. Ok I have decided that since I did 4bolt mains, forged pistons/rods...that I should also do a forged crank for insurance. I know, some of you people claim to run up to 700hp on stock cranks, but I dont want to be one to test that theory. So, with that being said...what cranks are you 700+hp guys using(other than stock, lol)? I dont want to spend $1000 on a crank, but dont want the POS $190 IRON crank either. Also, where do you get it from? I see summit has a few but its basically either a $1000 or $200piece. It would need to support 7000rpms and close to 800hp(thats with 300 of it nitrous)on occasion? So are there any inbetween(like $400 or so) thatll do the job? Thanks!


BTW...the nitrous kit ill be running is the new TNT Dry Direct Port Kit. I never heard of it, till the other day when racinLT1 sent me the link to it. I had to have it and ordered the next day. Cant wait to test out that beast!! No more zex...or compucar for that matter.
Callies "Dragonslayer" or Scat 4340 forging (a little less expensive but Chinese). Get the Dragonslayer direct from Callies along with the rest of your engine "kit". Good prices and service.

Rich Krause
Old Jan 16, 2004 | 06:50 PM
  #17  
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Rk, lol...I wish I was still in the "kit" buying process. Did you not really read my entire post, but rather skim it over?!?! I have all the parts and have already balanced the assembly once, but with stock crank. I have decided last minute not to run that risk and to run a good crank....so Ill have to deal with balancing prices again amoung allmy other mess ups along this buildup.

Anyhow, Im going to look into the crank on ebay before anything else. It meets the requirements I have(pretty much, little low on HP but im hoping the built in "safety zone (ie. good for a few %more hp than rated)" will cover that) and is very affordable. I found a main seal swap kit from summit(thanks Mike383) but will have to wait till I can call and confirm its what I need tomorrow. If thats the case, I will be settling for the ebay crank. If money was no object, sure I would buy the callies. But, Im already 11k to deep into this winter project and starting to struggle with funds so I think Ill have to settle for what I can afford, but still support my needs. Thanks!

Last edited by N2OpwrdTA; Jan 16, 2004 at 07:00 PM.
Old Jan 16, 2004 | 06:56 PM
  #18  
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Originally posted by N2OpwrdTA
Rk, lol...I wish I was still in the "kit" buying process. Did you not really read my post, but rather skim it over?!?! I have all the parts and have already balanced the assembly once, but with stock crank. I have decided last minute not to run that risk and to run a good crank....so Ill have to deal with balancing prices again amoung allmy other mess ups along this buildup.

Anyhow, Im going to look into the crank on ebay before anything else. it meets the requirements I have(pretty much) and is very affordable. I found a main seal swap kit from summit(thanks Mike383) but will have to wait till I can call and confirm its what I need tomorrow. If thats the case, I will be settling for the ebay crank. If money was no object, sure I would buy the callies. But, Im already 11k to deep into this winter project and starting to struggle with funds so I think Ill have to settle for what I can afford. Thanks!
Ooops, you caught me. I just skimmed it. Balancing is not cheap, as it seems you already know. I just bought a rotating assy. and spent nearly $300 in Mallory metal plus the cost of the balancing

Those rear seal adapters leak, so be prepared for that as it is almost inevitable, from what I have seen. As far as the eBay crank, it's a real crapshoot. It could be a fantastic bargain or a POS or anything in between. Who knows? I'd keep the car off the road until I could afford a "name" brand, but that's just me. Better off with the Scat "cast steel" crank, IMHO. Have you checked that one out?

Good luck and sorry for not reading a bit more carefully.

Rich Krause
Old Jan 16, 2004 | 07:07 PM
  #19  
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Damn it...I had a feeling they would be prone to leaking. Hoepfully Ill get lucky if I go that rout and get a leak free setup.<--wishful thinking

Yeah, I know all about the cost of mallory metal now days. When I took my stock crank/parts to be balanced they said, ah yeah...we can do it for $200. They call to say that(and the resurfaced flywheel) are done. Your total is $404 Apparently, that hidden $150 came from the mallory metal they had to add and balance.

Anyhow, I hope thats not the case with the next crank. They said they would hook me up(since they have already gotten about $1200 of mine for magnalfux block, machine, 4bolt mains and balancing work a few times) and do the next crank for around $100-150 and not tax me much for any of the metal if needed. Hopefully, these cranks really are within +/- 2grams like the guy said. That will really help me out with them damn balancing fees.


BTW...so youre telling me a Scat cast crank rated at about 500hp and 6500rpm is better than a crank rated a 700hp and 7000rpm!?!? Are we talking about the same crank here? Send me a link to one if possible. Thanks!

Last edited by N2OpwrdTA; Jan 16, 2004 at 07:13 PM.
Old Jan 16, 2004 | 08:10 PM
  #20  
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I really don't care if the Eagle crank is made in ghetto land....they are proven on the track. I haven't heard of any issues with the Eagle cranks but have with the callies (on supercharged motors). They're both good cranks but i'm glad I chose the Eagle crank. There are too many turbo motors running great with no problems out of the Eagles. I wouldn't make my decision base on where it was made. Just my 2 cents.

Joe
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