theblur98ss

iTrader: (71)

I was browsing for a new setup and I came across a 418 offered by canadian performance. It had a 4.1 eagle crank listed. Has anyone ran one of these with boost? I thought I remembered hearing that it's not good to have a longer stroker then bore but I could be wrong.

2000 Tran Zam

iTrader: (2)

im supposed to be having my 408 bored out to a 418, however I dont know exactly if its a for sure thing so once I hear back from the motor company I can let you know...

but normally boosted setups Ive seen are either 346, 347, 364, 370, 383's on occasion, 402's and 408s (and 427's)...

ls1290

iTrader: (20)

I know several people that are build L92 block for boost. The stock bore is 4.065 and can get 416 with a 4.00" stroke crank. A little honing to get a 418 would be easy. Shirl Dickey make a 433 using a L92 block overbore to 4.1 using a 4.1 crank. He went with a high compression setup to road race, but there is not reason why one could not be done the same way for boost. According to him, the overbore still left plenty of cylinder wall thickness. I am serious looking at using a L92 block here

Keith

red beast

4.080 bore and 4.00 stroke with L92 block, but don't ask how I know...

theblur98ss

iTrader: (71)

The setup I'm looking at is 6.0l block, 4.03 bore and 4.1 stroke.

SuperZ

iTrader: (2)

from what Ive seen you don't want to go with the 4.100 stroke on a boost or nitrous motor.Its somthing to do with the piston rings and having more blow by.

BIG BAD BLACKSS

iTrader: (4)

Piston is too short and the wrist pin protrudes into the rings possibly? I know older 347 ford strokers had issues with that.

Ryne @ CMS

iTrader: (10)

alot of the l92 blocks, including one of my own, the sleeves actually sit crooked in the block. then when they are bored the sleeve thicknesses on either side could vary by as much as .020" +. but i had word that some of the newer l92 blocks the sleeves are in straight. just some food for thought

Beaflag VonRathburg

iTrader: (176)

The problem is that it moves the pin further up into the piston making ring packages difficult. Also with the iron blocks having some of the shortest sleaves of any factory block combined with the long stroke it pulls part of the piston out of the sleeve. It can lead to having blow by and oil consumption issues.

GueSS Who

Bigger bore
smaller stroke


Better in every combination.

Beaflag VonRathburg

iTrader: (176)

I don't agree with the every situation. Do you read about the engine master's challenge? The past few years have been dominated by long stroke / small bore combinations.

Mr.MartyStone

iTrader: (12)

Look at the limits imposed on those engines for RPM requirements. That changes everything! Plus they're just dyno queens, not built for endurance of any sort.

Marty

ls1290

iTrader: (20)

Hmmmm... good to know info

Keith

Beaflag VonRathburg

iTrader: (176)

Also look at the limits of the gen 3 blocks. Makes a lot more sense then. Unless you want to resleeve at the price of a kidney.

Inspector12

iTrader: (29)

Yeah I have a friend with a 418 darton block with an F1C on it and it runs good.