Building a 383, I need a little help.
10-22-2007, 11:39 PM
#43
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I just goggled the #'s on the block and it came up as a 97 and up block. Should I use this one or get a newer one?
I was told it does not have the bay to bay breathing that the LS6 block has but is stronger due to not having these holes in the bottom end.
I was told it does not have the bay to bay breathing that the LS6 block has but is stronger due to not having these holes in the bottom end.
10-23-2007, 04:23 PM
#46
lilbuddy, does your 383 like that big split?
JR, make sure you go with a cam at least in the 240's. I have a 237/241 cam with high lift on the intake side and it did not perform well for my 383. I'm going to a cam with more duration but less lift. It has a big split also.
JR, make sure you go with a cam at least in the 240's. I have a 237/241 cam with high lift on the intake side and it did not perform well for my 383. I'm going to a cam with more duration but less lift. It has a big split also.
10-23-2007, 10:30 PM
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Here's a few selections I have in mind. Please give some advice on any of these.
TPS Texas giant 248/254 .611/.613 113lsa
Speed Inc SS1 238/244 .605/.612 112lsa
Vengeance VRX7 244/248 .612/.596 112,113,114lsa
Vindicator 240/244 .608/.596 ?lsa
These are just a couple I have found to be appealing to me. I want it to be street-able but more on the wild side.
TPS Texas giant 248/254 .611/.613 113lsa
Speed Inc SS1 238/244 .605/.612 112lsa
Vengeance VRX7 244/248 .612/.596 112,113,114lsa
Vindicator 240/244 .608/.596 ?lsa
These are just a couple I have found to be appealing to me. I want it to be street-able but more on the wild side.
10-24-2007, 12:46 PM
#50
Just posted this in the other 383 thread. I also tuned another 383 belonging to one of the guys that posted in this thread, if that even matters.
383, AFR205s, Fast 90, pretty mild cam. Something like a 239/243 .615 on a 113+3.
Its all in the heads, cam choice, and of course the tune.
This was also with a road race safe 12.6:1 or so, and 26 degrees of timing up top.
383, AFR205s, Fast 90, pretty mild cam. Something like a 239/243 .615 on a 113+3.
Its all in the heads, cam choice, and of course the tune.
This was also with a road race safe 12.6:1 or so, and 26 degrees of timing up top.
10-24-2007, 01:03 PM
#51
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i believe on the '97-98 blocks the oil thru the front/rear covers wasn't that great and can oiling issues. bay to bay breathing on the ls6 blocks worked awesome, and was good for like 20+hp, all lsx blocks have this as well, but both come with a hefty price. jr i guess the best advise to give you is, either find a '99+ used block in good condition(it's already been seasoned, if you know what i mean) or buy a new ls1 block. the power and rpms that you will be making and turning, i think the likely hood of u breaking the block is very low. i did a 383 F/I motor for a local guy, using a 2000 5.3 block and it produces around 803hp at the crank w/9lbs. of boost and we don't have any issues. good parts, and perfect assembly will pay off big in the end.
10-24-2007, 10:43 PM
#52
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Well, A guy told me about a place called SMC that has 2 ls6 blocks new. They want 600+shipping for each of them. I hope they are not blems.. I'm going to call them tomorrow.
Or on the other hand I could get a 6.0 lq9 block and build a 402/408 and just get new pistons to fit it. My buddies are trying to talk me into doing this from the start. Maybe I should have listened to them.
Tony just posted results of a 403ci with 205's and mild cam that made big power and TQ. Maybe I should shift gears and just go that rout.
What do you guys think?
Or on the other hand I could get a 6.0 lq9 block and build a 402/408 and just get new pistons to fit it. My buddies are trying to talk me into doing this from the start. Maybe I should have listened to them.
Tony just posted results of a 403ci with 205's and mild cam that made big power and TQ. Maybe I should shift gears and just go that rout.
What do you guys think?
10-27-2007, 09:35 AM
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Well actually my buddies convinced me to just build a iron 402/408. That way I can really beat on it. Like a 250+ HP shot. I could build it for the same money. Why not other than the weight factor.
So, this short block I have is up for sale... If you know someone thats interested, shoot them my way.
And I think I found another LS1 powered toy(drag car) So I may be de modding the car. Just to put it in street trim. Maybe.
10-27-2007, 09:27 PM
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Well actually my buddies convinced me to just build a iron 402/408. That way I can really beat on it. Like a 250+ HP shot. I could build it for the same money. Why not other than the weight factor.
So, this short block I have is up for sale... If you know someone thats interested, shoot them my way.
And I think I found another LS1 powered toy(drag car) So I may be de modding the car. Just to put it in street trim. Maybe.
So, this short block I have is up for sale... If you know someone thats interested, shoot them my way.
And I think I found another LS1 powered toy(drag car) So I may be de modding the car. Just to put it in street trim. Maybe.
