383 with L98 heads - LS1TECH



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383 with L98 heads

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Old 07-17-2010, 07:29 PM   #1
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Default 383 with L98 heads

what do you think about this fun project a 383ci with flat tops and 2 valve relifes 224/230 112lsa cant remember the lift but I guess something around .510" and L98 aluminum heads mild ported and air gap performer rpm intake ? how much hp do you think it will have?
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Old 07-17-2010, 07:40 PM   #2
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nothing too powerful hp wise. but it will make for sotp fun.
will feel strong, but will prolly run out of breath real quick.
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Old 07-17-2010, 07:42 PM   #3
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it already run out of breath real quick they are unported should I port them to race port or try to find a good cheap decent heads?
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Old 07-17-2010, 07:48 PM   #4
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sell those and get some better heads. theres few around for good prices.
i would.
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Old 07-17-2010, 07:49 PM   #5
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will do tomorrow I will call some friends and see what they got laying around
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Old 07-17-2010, 07:59 PM   #6
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i would just pay for new heads.
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Old 07-17-2010, 08:00 PM   #7
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Im on a budget right now building two engines one is 383 and the other 350 but cant decide which bore size to go with
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Old 07-19-2010, 11:28 PM   #8
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Tried looking into Scoggin-Dickey? You can pick up some vortec heads for a fair price brand new. I've seen more than a few people making well over 400-450 rwhp on vortec heads.
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Old 07-20-2010, 01:58 AM   #9
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I already got the L98 heads thats why I thought of putting them on the 383
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Old 07-20-2010, 06:19 AM   #10
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It will run pretty good, make tons of torque but as stated, will not be a top end screamer.
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Old 07-20-2010, 06:29 AM   #11
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I can take them to someone and port them should I port them? they are stockers
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Old 07-20-2010, 02:10 PM   #12
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Porting will help, but they are limited t what they can do, if it is the right price then i say port them, but usually the price is steep and the price is usually high enough to have just spent a tad more to get some aftermarket heads. Patriot has some great heads for a decent price.
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Old 07-20-2010, 04:02 PM   #13
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My understanding is that these heads can be VERY good when properly ported. Lingenfelter has managed to get some very impressive results with these heads. They may be RPM limited, but the low RPM velocity seems to be very impressive with these heads, which should make them very, very fun on a high torque street car.

I've got a warmed over L98 in my 91 Corvette, and to be honest, it's a lot more fun than my friend's 2010 LS3 Grand Sport. It's nowhere near as fast at the track, but on the street it's an animal. With an extra 33 cubic inches, it can only be better.
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Old 07-27-2010, 06:42 PM   #14
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Quote:
Originally Posted by Jim85IROC View Post
My understanding is that these heads can be VERY good when properly ported. Lingenfelter has managed to get some very impressive results with these heads. They may be RPM limited, but the low RPM velocity seems to be very impressive with these heads, which should make them very, very fun on a high torque street car.

I've got a warmed over L98 in my 91 Corvette, and to be honest, it's a lot more fun than my friend's 2010 LS3 Grand Sport. It's nowhere near as fast at the track, but on the street it's an animal. With an extra 33 cubic inches, it can only be better.
so your saying that your tpi corvette is more fun than ls3 c6?
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Old 07-28-2010, 08:54 AM   #15
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I believe David Vizard put it like this..."if you have these heads already, use them. If you don't, don't spend money trying to get them". I think they can work with your setup. I would tighten up the LSA on the cam (maybe around 108) and make sure your REAL compression is around 10.5:1.
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Old 07-28-2010, 04:33 PM   #16
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I already got these heads and got LT4 hot cam
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