Considering going turbo

[Raymond_B]

Two important questions need to be answered. Are you sticking with the stock block and what fuel do you plan on using. 10 to 1 compression is fine if your running E85. Stock block will only handle 600-700 rwhp reliably. Smallest turbo I would use would be a 76 with bigger exhaust housing. An 80-88mm would be a little more suited on a 408. Hey, but what do I know.....

Man, if only there was an awesome fully girdled stock block 10:1 (depending on heads) 410w that could handle 800+ hp for sale

 

[mustangman408]

Man, if only there was an awesome fully girdled stock block 10:1 (depending on heads) 410w that could handle 800+ hp for sale

You said you only could take "time" for a trade ...Plus I basically have all the stuff for my 408 except a set of rods

 

[Raymond_B]

You said you only could take "time" for a trade ...Plus I basically have all the stuff for my 408 except a set of rods

:tu

 

[mustangman408]

Now lets talk wastegates and BOV's. Size, brand, best locations?

 

[Lucifer Sam 2]

Went with twin 38mm tials and a jgs BOV
ebay intercooler.

the waste gates dump just outside the frame rail before the front tire

 

[mustangman408]

I want to mount mine on that side. Really would like to retain A/C, don't mind ditching the p/s. Will prolly have to have some AC lines made.

 

[Turbosvt93]

Went with twin 38mm tials and a jgs BOV
ebay intercooler.

the waste gates dump just outside the frame rail before the front tire

How loud is the wastegate dumps?

 

[rudder9]

I had both w/g and bov in 50mm size. Turbosmart gate and Tial Bov. Do not cheap out on these parts especially the gate. A cheap Chinese gate and a stock block could very well mean you own a puzzle. My gate was open dumped. It was loud, but not obnoxious and I kind of liked it. Scared the bejezzus out of a few people on the street.

 

[Lucifer Sam 2]

How loud is the wastegate dumps?

I don't really notice them over the exhaust.
The only time I could actually hear them is when my distributor slipped and was 12* retarded

how loud they are probably has to do a lot with back pressure and dump tube length.
With that 1.32 ar housing I cant imagine Its choked down much, and my dump tubes are probably less than a foot long

 

[mustangman408]

How close to the turbo does the wastegate need to be mounted?

 

[Lucifer Sam 2]

Its my understanding the angle of the wastegate in relation to exhaust flow is more crucial.

 

[mustangman408]

Its my understanding the angle of the wastegate in relation to exhaust flow is more crucial.

Explain please? (I know I'm wearing you guys out with questions, but it is very much appreciated)

 

[Turbosvt93]

http://www.treadstoneperformance.com/~treadstone/prod_imgs/wastegatep.jpg

 

[rudder9]

Great example Adam. Try to get as close to that as possible, or at least 120*. Close to the turbo as you can too.

 

[mustangman408]

Great info fellas, thanks for all the help.

 

[mustangman408]

One more question???? What rear gears are you guys running?

 

[Briansshop]

One more question???? What rear gears are you guys running?

4.10s were a lot of fun, no traction at all. 3.73s are much better.

 

[mustangman408]

Were you running out of fear with the 4:10's? I know you're putting a new combo together. It seems to me that these turbos like a taller gear.

 

[rudder9]

I'm also running 4.10's. Brian is accurate which traction. Although I think with my converter and the higher stall it's not as bad. I'm going to wait to see what the twins feel like then I'll make a decision whether to change.

 

[Briansshop]

Were you running out of fear with the 4:10's? I know you're putting a new combo together. It seems to me that these turbos like a taller gear.

Never ran it at the track w/the 4.10s, wish I did, I think it might have dipped into the 11s. I switched to the 3.73s just because of lack of traction on the street.