Help me decide please.
Thread Starter
Joined: May 2007
Posts: 375
Likes: 1
From: Wenatchee WA
Help me decide please. FIRST! Yes I have tried the search function, and have read threw MANY post. 
However I still find myself stuck between a 402 and a 408, and would like your help to make a decision.
My plans are to use my current mods in my sig for the time being, but im going to go to a F1-A W/ a FMIC. Im already having an issue with fuel, so I know that will have to be dealt with first. Im hoping to hit ~15psi on this build, and dont see a reason why I wont. Car will be used on the street, some road events, and some occasional drag visits.
To me there doesn't seem to be a huge price difference between the two. I believe the weight difference is somewhere between 70-90lbs, and Of course the iron block will be stronger but is it necessary for 700-850rwhp.
Sorry for making another "this or that" thread, but I have been dwelling on this for quite some time. I have read threw many post, but could not find anything that made me feel confident in my decision. Can anybody offer any other ideas that will help me make a decision?
Thanks
Troy
However I still find myself stuck between a 402 and a 408, and would like your help to make a decision.
My plans are to use my current mods in my sig for the time being, but im going to go to a F1-A W/ a FMIC. Im already having an issue with fuel, so I know that will have to be dealt with first. Im hoping to hit ~15psi on this build, and dont see a reason why I wont. Car will be used on the street, some road events, and some occasional drag visits.
To me there doesn't seem to be a huge price difference between the two. I believe the weight difference is somewhere between 70-90lbs, and Of course the iron block will be stronger but is it necessary for 700-850rwhp.
Sorry for making another "this or that" thread, but I have been dwelling on this for quite some time. I have read threw many post, but could not find anything that made me feel confident in my decision. Can anybody offer any other ideas that will help me make a decision?
Thanks
Troy
I think you'll need some bigger injectors to feed a 400+ ci moter. I dont get it......a 402 is a 408........the only reason you build a 408 is if you have to bore the cyclinder, due to previous use.
The difference between iron and aluminum is about 94lbs, +- 1 lb. The difference between a 402 and a 408.......about 0.10 of a pound.
BTW, boost is only the measure of the ristriction of the intake. You should never shoot to run a certain boost. Other then the lowest to achieve the goal. 15 psi with one head is 150 hp lower then another head at 15 psi.
Controlling knock is ussually easier on smaller bores too, so the 402 is theoretically better, but that depends on your knock control methods way more.
The difference between iron and aluminum is about 94lbs, +- 1 lb. The difference between a 402 and a 408.......about 0.10 of a pound.
BTW, boost is only the measure of the ristriction of the intake. You should never shoot to run a certain boost. Other then the lowest to achieve the goal. 15 psi with one head is 150 hp lower then another head at 15 psi.
Controlling knock is ussually easier on smaller bores too, so the 402 is theoretically better, but that depends on your knock control methods way more.
Exotic Performance Plus is putting together a 408 Iron block with all forged internals and I am hopefull to get around 15 lbs. of boost.The iron block is bullit proof and I should be able to run it all day long with no problems. My vote is for the IRON BLOCK.
We had good success with both iron and aluminum blocks. Perhaps my engine has held together through several hard rear bumper wheelies because it is an iron block, but a well built LS2 block will handle a lot of power. Check out this LS2/402 with an F-1A.
http://www.exoticperformanceplus.com...Car.php?car=29 Bob
http://www.exoticperformanceplus.com...Car.php?car=29 Bob
Thread Starter
Joined: May 2007
Posts: 375
Likes: 1
From: Wenatchee WA
We had good success with both iron and aluminum blocks. Perhaps my engine has held together through several hard rear bumper wheelies because it is an iron block, but a well built LS2 block will handle a lot of power. Check out this LS2/402 with an F-1A.
http://www.exoticperformanceplus.com...Car.php?car=29 Bob
http://www.exoticperformanceplus.com...Car.php?car=29 Bob
Troy
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
