How much Rwhp???

hollisterguy40

New Member
Feb 22, 2007
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miami
What rwhp numbers will i be seeing on a 7mgte with a manual boost controller , downpipe , 3inch exhaust , intake and intercooler kit ?
 

Doward

Banned
Jan 11, 2006
4,245
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36
Alachua, FL
BHG +/- 250 rwhp.







:3d_frown: Is this the most commonly asked question, or what? How about something more like this -

"Hey guys, before I go modifying my car and killing another Supra, what weak points should I know about these cars?"

Well, I'm glad you asked! The head gasket, from the factory, is undertorqued. A lot of people will tell you to go MHG and don't look back, but I ask you what your goals are. If you want to run a little more than stock boost (up to about 12) and that's really it, then a stock headgasket + ARP head studs will serve you fine. Be sure you check that looooong head for straightness, and if it requires any machine work, get the timing plate machined as well, to avoid a nasty leak there. Some have gotten away with just retorquing the head gasket (I did, for about 8 months) but in the end, you will tear into there eventually.

Other than that, check out all your electrical connections. The car is almost 20 years old, after all!

And to answer a question that you had in a previous post, the most cost effective way of modifying ANY engine, is to VERIFY that you are running AT LEAST as good as the day it came off the factory floor. Do a compression test. Check your timing belt for slack. Check your timing.

Otherwise, your chances of killing it go up astronomically.
 

AlexSmith

Argue this!
Feb 16, 2007
71
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DFW Texas
hollisterguy40 said:
What rwhp numbers will i be seeing on a 7mgte with a manual boost controller , downpipe , 3inch exhaust , intake and intercooler kit ?

Vague question, needs more specifics. What condition is the engine? How much boost? What type/size of downpipe? Which intake, and what size intercooler? What size intercooler piping?

-Alex
 
Dec 3, 2003
6,653
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Canada
"Knock" it off with the rod knock stuff. Pun intended LOL
Serious though..the HP would be around 260-280 plus. That should get you in the high 13's if you can drive.

PS: The question was what HP would he have given the mods. ;)

Duane
 

Wills7MGTE

( . )( . )'s RULE!!!!
May 12, 2006
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EVER HEAR OF A DYNO, honestly, I have seen 3 supra's with the same mods 2 of which had the same brand and model parts for everything, all 5 speeds and all ran at least a 10hp and in one case a 34ft/lbs torque difference in thier output. You have officially pissed me off, buy some neon and a wing becasue we all know your nothing but a hot steamy bowl of uncle bens.
 

LordLo

New Member
Jun 20, 2006
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I run 15 psi on the stock "ebay" hg with ARP studs. Been like that for 8 months and ~9,000 miles. I doubt 12 psi will hurt the stock hg, HOWEVER, once you experience 12 psi, you will want 13, 14, 15, then hit fuel cut. It has not blown yet (maybe due to me torquing it down to 100 lbs, haha), but I'm going to change over to a mhg springbreak along with a stock rebuild, possibly forged pistons.
 

Wills7MGTE

( . )( . )'s RULE!!!!
May 12, 2006
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I hit fuel cut at 12psi usually, I'd say get a good set of rods and bearings, the stock pistons are fairly good unless the motor is dogged. If you get pistons I will say the ross pistons have the oil squirters pred drilled whereas JE pistons do not. GOOD LUCK
 

Boost Lee

Bee Doo Bee Doo Bee Doo
Staff member
Sep 13, 2006
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hollisterguy40 said:
What rwhp numbers will i be seeing on a 7mgte with a manual boost controller , downpipe , 3inch exhaust , intake and intercooler kit ?

hollisterguy40 - I'll be straight up. You seem like a cool, friendly guy...

But I'm getting irritated (or, for lack of better words, frusterated) with the approach you are taking with your Supra.

Understand that MAINTENANCE (with a 20 year old car) is a MUST come first before you EVER think about throwing anything at it as far as horsepower adders goes.

Just make sure you understand that if you want to "impress and depress" those Honda turds, you won't achieve this by flying by them with smoke rolling out of your hood and coolant pissing all over your tires.

As for your estimated RWHP numbers, there are MANY things that factor in:

-Motor condition
-Rebuilt motor or stock 20yr old parts
-HOW much boost with this "MBC".
-A340E (AT) or R154 (MT)
-Just "how" thick your downpipe is and whether or not it eliminates your elbow
-Size and design of intercooler
-Outside standing temperatures (or underhood temps, for that matter)
-How free flowing this exhaust is...

I hate to keep throwing things on...but everyone has spoke the truth.
It really depends...

My guess: 250-280rwhp given it's untuned, not tons-o-boost and a warm summer day.


-Jeff
 

Reign_Maker

Has cheezberger
Aug 31, 2005
5,767
0
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51
Florida
WHOO HOOOOOOOOOO hostility all over this thread, and in a sense, understandable, but please guys try to keep it as constructive as possible, there was a time when we all had 23 posts and wanted nothing more than to haul ass in our new found Supra... This question is vague, commonly asked, and the nessecary precautions often over looked... My advice to you newb, is to not worry about how much power your motor will make until you make sure it can take it... There are so many variables; wear and tear are one, mileage is another... Like Will so elegantly stated, he's seen 3 cars with the same mods make different power, and that is most likely due to the mileage on each car, the plugs & wires they were using, and the over all internal condition of the motor and tranny... *among other things*

So handle what is weak before you find out the hard way...
 

AlexSmith

Argue this!
Feb 16, 2007
71
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DFW Texas
Everyone bashing this guy for maintenance issues and condition... who said he hasn't done this already or is not already aware of that? Good grief.

-Alex
 

starscream5000

Senior VIP Member
Aug 23, 2006
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Hot and Humid, KY
Because he's posting up other dumb question on here where I have been trying to beat it into him that "maintenace first" is the way to go. Surely after I've mentioned it to him a few times he would have at least acknowledged it with, "oh, I've already done that stuff", but no, he keeps on asking dumb questions about what he needs to do to beat turbo'd hondas and shit. He doesn't even know the difference between RWD and AWD vehicles :3d_frown:.

Sorry for being rude, but this was well deserved ;).
 

AlexSmith

Argue this!
Feb 16, 2007
71
0
0
DFW Texas
starscream5000 said:
Surely after I've mentioned it to him a few times he would have at least acknowledged it with, "oh, I've already done that stuff", :3d_frown:.

Not trying to sound rude man, but who said he had to respond? I see your point man, so don't think I am trying to talk shit or something, but it is just a simple question, and I would hope that he would consider maintenance before mods. Maybe that should be my quote:)

-Alex