Boost question on a SBF

what is my boost limit on a no o-ringed block/heads, dart eagle block and a set of 205cc twisted wedge cylinder heads ? and what is the best head gasket for the application ?

car is usually at 22-24lbs of boost , but on this pass we had a spike around 30lbs

I usually install the Felpro 1006 "locwire" gaskets on boosted/nitrous combos. It's only a .010 groove in the head and I have 1 customer with 2 seasons at 26-28 lbs. and no issues. It's either that or Cometics, but I've seen seepage with them, and also distortion like you already have.

pmrphil wrote:I usually install the Felpro 1006 "locwire" gaskets on boosted/nitrous combos. It's only a .010 groove in the head and I have 1 customer with 2 seasons at 26-28 lbs. and no issues. It's either that or Cometics, but I've seen seepage with them, and also distortion like you already have.

With a Dart block, the Cometics will usually work ...
with a production block, nothing works for very long without O-ringing the block.

What fuel?

wickettoby1 wrote:What fuel?

e85

Do you know why the boost spiked higher than normal?
Are they just the standard ARP SBF studs? You may want to ask them about a stud upgrade to a 625 series material for more clamp load seens how you can’t add more fasteners.

Do you know why the boost spiked higher than normal?
Are they just the standard ARP SBF studs? You may want to ask them about a stud upgrade to a 625 series material for more clamp load seens how you can’t add more fasteners.

Dont know, waste gate is not sticking , going to have the tuner go thru it and check things out and check out the boost controller

rebuild in progress , old bearings looked good just upgrading to the coated ones, cometic gaskets ,

bruno wrote:what is my boost limit on a no o-ringed block/heads, dart eagle block and a set of 205cc twisted wedge cylinder heads ? and what is the best head gasket for the application ?

car is usually at 22-24lbs of boost , but on this pass we had a spike around 30lbs

I can't tell you the boost limit but, without "O" ringing, the MLS gaskets will work the best.

rmcomprandy wrote:

bruno wrote:what is my boost limit on a no o-ringed block/heads, dart eagle block and a set of 205cc twisted wedge cylinder heads ? and what is the best head gasket for the application ?

car is usually at 22-24lbs of boost , but on this pass we had a spike around 30lbs

I can't tell you the boost limit but, without "O" ringing, the MLS gaskets will work the best.

yes sir , we are gonna give it a try ....

bruno wrote:

I can't tell you the boost limit but, without "O" ringing, the MLS gaskets will work the best.

yes sir , we are gonna give it a try .... [/quote]

Also, after a couple heat cycles, take the rockers off and re-torque the heads one bolt or stud at a time. Back one off and re-torque it ... one at a time.

rmcomprandy wrote:

bruno wrote:

I can't tell you the boost limit but, without "O" ringing, the MLS gaskets will work the best.

yes sir , we are gonna give it a try ....

Also, after a couple heat cycles, take the rockers off and re-torque the heads one bolt or stud at a time. Back one off and re-torque it ... one at a time.[/quote]

yes sir will do !

engine is making great steam on the street , we have a 26 psi street tune about 14xx rwhp and feels really good. Just need to keep those IAT down. Going to do a custom heat exchanger in the rear after the ice/water tank for the A2W intercooler ......