magnus

If you use the TD06 manifold, either weld a T-04 flange or make an adaptor you can fit the T-78 without problem on the TD-06 header.

SPEED_NYC

iTrader: (3)

Again, can anyone tell me what the OD of the runners on the T78/88 kits are and what the diameter is on the TD 06 kits? thanx

sub-zero

Where is the best place or any place to find a T04 flange to weld on my TD06 manifold? Any one!! I need to get this in my car.

Thanks

sub-zero

Speed, I will measure the runners on the Td06 manifold I just got. The manifold is much diff. then the pic. in this thread. Hopefully someone can give us a measurement of a T-78 or T-88

faster7

Depending on what you have, I MAY trade a cast Greddy T04 mani for your TD06 manifold. Let me take some measurements of what I'd need in a TD06 manifold...

(Part would come from the Greddy TD06 kit that has a T04 mani and then an adapter..I can keep the adapter to look at and run the same setup with one less gasket.)

magnus

2 inch on TD06 and T78 headers, T88 has 2.25" or 2.5"

SPEED_NYC

iTrader: (3)

thank you mangus. so now i guess my question is.... who wants to trade thier T88 manifold for my T78?

also, at what boost/hp level will the larger diameter runners make a noticeable diffrence?

thanx

Poweraxel

sure its nice to have wider runners but ported exhaust sleeves should be considered with it

SPEED_NYC

iTrader: (3)

sorry, should have mentioned, motor is street ported, exaust sleves opened up lots

magnus

T-88 manifold slows exhaust velocity too much, you will have a gigantic increase in lag, not much of a gain in top end.
Bigger runners are usually used for better wastegate control.

SPEED_NYC

iTrader: (3)

better wastegate control? couldn't you just use a larger diameter pipe to go to the wastegate, and leave the runners to the turbo a smaller size.
if there is no performance advantage, then why do they use large runners on the T88 and SFP manifolds?

there has got to be a way to get good wastegate control without increasing lag like that...

sub-zero

I am obviously new at this. But can you guys help.
My greddy manifold has the following dimensions, I do not know were you guys are measuring from but
My manifold is rectangular and is a Greddy Td06 ?
The dimensions:
OD is 4 3/8ths " by 2 5/8ths "

Id is 2 5/8ths " by 2"

Bolt holes center to center are approx. 3 3/8ths and 1 7/8ths

Can someone help me on this, If I can fit a T-78 on this I would be very happy. If not What is the biggest TD06 Made that will fit ?

I have found a 25 G 17 cm2 and a 25 G 20cm2 but no one knows if they will fit.

Please help if you can

Thanks