T-trim on a 4.6 dohc

[schef]

I just got the bottom end of my 4.6 dohc engine rebuilt with all the goodies such as all forged internals and a 9:1 compression. I didn't have enough cash to upgrade my heads so they are pretty much stock. I'm getting ready to put a Vortech T-trim with the after cooler. Does anyone have a similar set up or might know what kind of power output this will be? Thanks

 

[droptopsnake01]

600+rwhp

your gonna need a 8-rib.

 

[schef]

Thanks, I will make sure to do that. What about boost, what would be a safe psi to run at?

 

[droptopsnake01]

well shit if it forged give it hell. Its forged for a reason right???

When i put a T-trim on my car I will run 18psi or more.

 

[schef]

Hahaha, hell yeah it is! What kind of fuel system are you running?

 

[droptopsnake01]

Hahaha, hell yeah it is! What kind of fuel system are you running?

03/04 cobra tank twin gt pumps, sct2400, and 60's.

 

[schef]

Looks like I better buy a few more things before I get my blower. I have 3.73's right now. what's your opinion on switching them out to put 4.10's in?

 

[droptopsnake01]

stick with the 3.73's.

I have 4.30's and its too much, im getting 3.73's.

 

[UCBeau]

3.73's are nice, i like them on my blown 01.

 

[schef]

Thanks guys for your input!

 

[BLWN32V]

i have a t trim on my 2000 GT with ported heads and cams it made 680rwhp and 540 tq with 19 pounds of boost on a 6 rib belt!!!

 

[droptopsnake01]

i have a t trim on my 2000 GT with ported heads and cams it made 680rwhp and 540 tq with 19 pounds of boost on a 6 rib belt!!!

what size pulley?

race gas?

 

[schef]

I checked out your car on the link to that website, your car is sweet! How do you like your gears? I'm deciding whether to switch from 3.73's to 4.10's

 

[J's98Snake]

Schef-

If you still can port the heads! It's worth the money and with FI you really need to port them.

IMO 3.73 are the perfect gear for a FI car. I had 4.30 when I was n/a and running n20. Now with the Fi set-up my 3.73's are perfect. I've cut 1.48 60's with the 3.73 and 28in slicks.

As far as power goes my specs:
forged bottom end 9.05:1 comp, ported B heads, stock intake, stock cams (for now) long tubes, s-trim 18 psi (6-rib belt slip) = 570 rwhp 504 rwtq. With a 100 hit and a lot of belt slip I made 671/603 on a mustang dyno.

If you haven't already you need to upgrade your valve springs. If you were only going to run 10-12 psi you could get away with it, but 18+ you need an upgrade.

 

[LS1PUSSOUT]

Get the 8 rib! Should see well over 600whp on say 16-18psi.

 

[04OrangePeel]

I just got the bottom end of my 4.6 dohc engine rebuilt with all the goodies such as all forged internals and a 9:1 compression. I didn't have enough cash to upgrade my heads so they are pretty much stock. I'm getting ready to put a Vortech T-trim with the after cooler. Does anyone have a similar set up or might know what kind of power output this will be? Thanks

Hey I have a 2004 Gt 2V and a Vortech V2 SQ with 9 pounds of boost on the stock block, and 390 gears!!! What did you do to build your bottom end up with, how much did it cost??? I want to do the same on my 2 V and boost it up around 12-14 pounds of boost!! Help me if you can....Thanks

 

[schef]

Hey I have a 2004 Gt 2V and a Vortech V2 SQ with 9 pounds of boost on the stock block, and 390 gears!!! What did you do to build your bottom end up with, how much did it cost??? I want to do the same on my 2 V and boost it up around 12-14 pounds of boost!! Help me if you can....Thanks

I got lucky with this block that I have, I knew a guy in my area who took out a loan and was going to build an engine for a kenne bell blower, however after he bought everything he decidied he should go bcak to school... anyways He sold me his block with had forged everything, with a cobra crank, it was bored out .030 over and the compression is at 9:1. I also had billet oild pump gears installed along with my IMRC plates completely removed. I put a 7 quart oil pan with a duel flow bypass oil kit. My car holds 10 quarts of oil now. I paid 3000 for the block. There is a kit off of VT engines website that he bought the kit at. I did a lot of research and if i didn't come upon this engine block, I would have sent my Teksid block to JDM on the east coast, they were going to charge me a little under 4000 to rebuild it.

 

[schef]

Schef-

If you still can port the heads! It's worth the money and with FI you really need to port them.

Unfortunatly I didn't have the money to do it. It was going to be another 3,000. However, I going to buy a set of heads and build them up and when they are complete I'm going to take the engine back out and put the Hi-Po heads on.

 

[BoostedToy]

Unfortunatly I didn't have the money to do it. It was going to be another 3,000. However, I going to buy a set of heads and build them up and when they are complete I'm going to take the engine back out and put the Hi-Po heads on.

Don't worry about porting the heads. Stock 4v heads are more than capable. Unless you are turning your car into a race car and trying to flow more than 1000hp worth of air, forget about the heads. The money is spent better elsewhere. However, you should replace the valvesprings. Go get a capable valvetrain. Will you leave a little on the table without porting the heads? Sure. At the 600rwhp level, it really doesn't matter all that much.

 

[schef]

Don't worry about porting the heads. Stock 4v heads are more than capable. Unless you are turning your car into a race car and trying to flow more than 1000hp worth of air, forget about the heads. The money is spent better elsewhere. However, you should replace the valvesprings. Go get a capable valvetrain. Will you leave a little on the table without porting the heads? Sure. At the 600rwhp level, it really doesn't matter all that much.

I didn't change the valve springs either, how long do you thing they will last? and at what boost level?