???? about a ROAD RACING PREPPED STOCK LT-1/LT-4 CRANK.
03-01-2011, 11:54 AM
#1
Racer
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???? about a ROAD RACING PREPPED STOCK LT-1/LT-4 CRANK.
Hey Gents, will a well prepared and professionally balanced LT-1 or LT-4 Crankshaft be sufficeint for a ROAD RACING 355 with 6.125" rods H-beams, and SRP pistons? This engine will also have an ACCU-SUMP 3Qt system, and a CHAMPS 8Qt. ROAD RACING Oilpan. It will see 3k-6k rpm modulations, and some 7k sustained WOT stints. I know the stock crank is strong and has been used to make some very respectable RWHP #. I just wonder how many have used it for such an application? I just want a good sanity/feasibility check. I'm aware that many will suggest a new 4340 forged crank, which is fine, but if I don't ABSOLUTELY need it, I don't want to get it, when the money is better spent on the AI heads and AI Solid roller cam setup. Thanks everyone.
ALL RESPONSES ARE WELCOMED
BTW, I already have the rods and pistons and L-98 SPLAYED block, and crank so that is why I don't want to buy a FORGED CRANKSHAFT
.
ALL RESPONSES ARE WELCOMED
BTW, I already have the rods and pistons and L-98 SPLAYED block, and crank so that is why I don't want to buy a FORGED CRANKSHAFT
.
Last edited by 6SSPD; 03-01-2011 at 11:55 AM. Reason: Left something out
03-01-2011, 12:09 PM
#2
Le Mans Master
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2023 C5 of the Year Finalist - Modified
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St. Jude Donor '09-'10-'11
I will answer this the best I can. It should be fine for mild 400-450 HP builds, but I would not spin it to sustained 7K RPM. If you can afford to buy a forged crank I would.
That being said, I personally am building an engine using the stock L98 crank because I cannot afford a forged crank. My engine will also no see more than 6500 RPM and I only plan to make 400 crank HP.
That being said, I personally am building an engine using the stock L98 crank because I cannot afford a forged crank. My engine will also no see more than 6500 RPM and I only plan to make 400 crank HP.
03-02-2011, 01:49 PM
#4
Safety Car
Have you priced forged cranks? They're not too bad. I think my Eagle lightweight (8 lbs off stock) forged piece was less than $1000 but I'd have to dig up the receipt.
That said, I wouldn't worry about a stock crank, either. I ran a stock 2 bolt bottom end from a B body LT1 (cop car) with a strong top end (made close to 400 RWHP). I had no issues until I overheated the oil and spun a rod bearing.
I'd agree with Kub's assessment, 400 - 450 Crank HP is probably as high as I'd go, though.
That said, I wouldn't worry about a stock crank, either. I ran a stock 2 bolt bottom end from a B body LT1 (cop car) with a strong top end (made close to 400 RWHP). I had no issues until I overheated the oil and spun a rod bearing.
I'd agree with Kub's assessment, 400 - 450 Crank HP is probably as high as I'd go, though.
