Fox Twisted Wedge Exhaust Gasket Interference

PonyGTrider · Apr 15, 2020

Hi all,
I removed my headers off from my twisted wedge heads for some maintenance and noticed there are substantial in exhaust interference in the BBK shortiy headers due to prominent welding beads on all the headers ports. I ground and cleaned them so they are free flow now. the problem is that the fel pro 1415 show some interference too. Should I match those gasket to the heads ports for a little better flow without interference?

Thank you all

TOOLOW91 · Apr 15, 2020

Yes , unless you liked doing all the work for nothing .

PonyGTrider · Apr 15, 2020

Thanks TOOLOW91
I guess I'm getting bored doing nothing during my quarantine

TOOLOW91 · Apr 15, 2020









				PonyGTrider said: Thanks TOOLOW91 I guess I'm getting bored doing nothing during my quarantine Click to expand... Oh trust me I know the feeling . I have been taking care of stuff I’ve put off for months LMAO

PonyGTrider · Apr 15, 2020

TOOLOW91 said:
Oh trust me I know the feeling . I have been taking care of stuff I’ve put off for months LMAO

Well hang in there I know there are a lot of unfinished things we all have but couldn’t finish the because “We don’t have enough time” well we have plenty of time right now so right now we have no more excuses

Be safe you all

a91what · Apr 15, 2020

a small interference wont make much of a difference on a driver, however the first few inches of the exhaust port after the runner are very important. I slapped my longtubes on the car with the adapter plates and I know that at some point I will have to remove them to do some clearancing like you are right now, its not really needed but if I dont do it I will always wonder if I left some power on the table.

PonyGTrider · Apr 15, 2020

Thanks a91what
I think I'm following that same principal, not that I'm trying to squeeze every half horse out of that motor or trying to improve a half second, but just to know I'm doing the best I can to solve those variables for my own satisfaction.

Just for the sake of it I just calculated the exhaust interference area. It is 1.3712 square inches total... It should make a difference, maybe not as much as to smash you against the back of your seat or break your neck, but should be better exhaust breathing

revhead347 · Apr 15, 2020

Those aren't Fel-pro 1450s. You should be running a Felpro 1415. Shouldn't have to clearance anything with those.

Kurt

PonyGTrider · Apr 15, 2020

Thanks revhead347
I apologize, I made a mistake on my initial post I meant to say FelPro 1415
See the attached photo.
If anyone know another gasket part number with higher port (Roughly 1.700") The width still the same (1.250")

Sorry about the mistake

revhead347 · Apr 15, 2020

1415s are pretty big for any Trick Flow head. How does the gasket port match against the head? Is that buildup on the head side, or the header side?

Kurt

PonyGTrider · Apr 15, 2020

Thanks Kurt
That carbon build up is on the head side. The pics below are the header side and the header port

PonyGTrider · Apr 16, 2020

I placed the gasket on the heas and it seem that the gasket is shifted towards the top of the head. What you see the gasket shifted over the top of the head's port is how much yhe gasket interfeers on the bottom of the head port. is there any solution for that?
a) Making slots on the gaskets bolts holes?
b) Grinding the bottom portion of the gaskets to clear that interference bump
c) using other gaskets with bigger height? Which ones?

Thank you all

revhead347 · Apr 16, 2020

I am not sure what the next step up from a 1415 is. I've never seen it be that far off before. Before you take my advice, send that picture to Trick Flow and see what they say. I'd get another set of 1415s and see if the new set fits any better. If it doesn't, grind the bolt holes to align it.

Kurt

PonyGTrider · Apr 16, 2020

Thanks Kurt
Maybe the issue here is that those heads are way too old and Trick flow had the CNC program off

I already decided to grind the lower segment of all ports to match the heads. I already made a template from one old gasket and with the Dremel will fix them in no time. Tomorrow I’ll pick up a new set of 1415’s and would be interesting to see if I just had a bad set of gasket that gave me that bad off set.
Anyhow I’ll report any findings.
Thanks a bunch

revhead347 · Apr 16, 2020

Having to clearance gaskets is pretty common. Someone over ported the tops and bottoms of the intake ports on my heads, so I have to clearance the 1262 gaskets every time.

Kurt

PonyGTrider · Apr 16, 2020

Thanks Kurt
Well I I match ported my heads but left them just flushed to the edges of the 1262's so I don't have that issue on the intake side. Thank you for sharing

Fox Twisted Wedge Exhaust Gasket Interference

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