Long Awaited Turbo build...

[jodadejss06gt]

Jeremy I need to know what type of clamps you used for the exhaust wrap. I found some stainless steel straps at msc and we have the tool to tighten them here at work. They remind me of the straps you'd use on like a cv boot to axle shaft. Can you give me some pics?? Thanks man!

 

[JeremyH]

Ok didn't realize you had cams and springs , that will help carry the power curve ouut further .
Im still not a fan of turning the motor that high with stock oil pump .
Harmonics kill the pump . Im a big fan of just more boost less rpm .


Keep us posted .



Pete

Well n/a i was taking it to 68-6900, now im only going to 6500, and i have a frpp oil pump with tss gears

 

[JeremyH]

You guys need to be warned to be VERY CAREFUL when playing around with changing the exhaust housings on the turbos - especially the bigger singles.

True, by adjusting the housing size, you can get the turbo(s) to spool faster, but it is a tricky endeavor as it also cause more heat to be generated.

As soon you start changing the exhaust housing, your chances to lift a head increase ten fold for every millimeter you change it.

Do you honestly think the kit manufacturers use an exhaust housing to lag the spool on purpose? You can't honestly think that when the design kit - they don't want as low a spool time as possible - they use what they use because it RIGHT and the pros do not outweigh the cons on a mass production type of thing.

Do some research and be sure of what you are doing when you start playing around with exhaust housings...

I disagree, most kit ot oem turbo setups are more for "average" spool/longevity, and theres always room to improve/upgrade from a standard setup. So you saying going from a .96 to .81 puts me at 150 times the chance of lifting a head, huh? Just wondering what your reasoning is.

 

[JeremyH]

Jeremy I need to know what type of clamps you used for the exhaust wrap. I found some stainless steel straps at msc and we have the tool to tighten them here at work. They remind me of the straps you'd use on like a cv boot to axle shaft. Can you give me some pics?? Thanks man!

They are just stainless steel "zipties" from home depot, easily tightened with plyers. They arent that hardcore, yeah we have bandit strapping and dogs in dc kits in the navy that can hold thousand of lbs but its not that serious. Wrapping the wrap nice and tight keeps it all one pretty good the ties just ensure it doesnt unravel.

 

[jodadejss06gt]

We have a Fast Loc F-40 tool and these are the clamps I found at MSC. Without seeing all of the piping I'm not sure how many I'm going to need to wrap it or how much wrap I'm going to need. How much did you use? I was going to maybe go with the 1" x 50' and if I needed more just order some more.

 

[JeremyH]

We have a Fast Loc F-40 tool and these are the clamps I found at MSC. Without seeing all of the piping I'm not sure how many I'm going to need to wrap it or how much wrap I'm going to need. How much did you use? I was going to maybe go with the 1" x 50' and if I needed more just order some more.

Yeah that stuff is over kill i used 3-4 ties per pipe section 5$ at home depot.

 

[jodadejss06gt]

Nice, thanks man! So how much wrap did you use?

 

[JeremyH]

Post 443# price list updated.

 

[JeremyH]

Nice, thanks man! So how much wrap did you use?

The normal size roll wrapped the up/down pipes and the connecting pipe before the up pipe about 6-8 ft of pipe and i had a couple feet left over.

 

[JeremyH]

Oil restrictor came today came .065. Installed it and start up had a small puff of smoke then romped on it for awhile came to a stop and idle, no smoke! Started it up a few times and good to go!

 

[jodadejss06gt]

Nice work, I'm ging to have to do the same I'm thinking. I got the passenger side plugs out last night. I'm going to attempt the drivers side tonight. I think the fact that I drove for 15 minutes right before I attempted to take them out helped.

 

[JeremyH]

Nice work, I'm ging to have to do the same I'm thinking. I got the passenger side plugs out last night. I'm going to attempt the drivers side tonight. I think the fact that I drove for 15 minutes right before I attempted to take them out helped.

Yeah a little bit of heat should help and you can also spray some pb blaster or something similar down on each plug and let it sit for 10-15 mins first.

 

[ChevyKiller]

I disagree, most kit ot oem turbo setups are more for "average" spool/longevity, and theres always room to improve/upgrade from a standard setup. So you saying going from a .96 to .81 puts me at 150 times the chance of lifting a head, huh? Just wondering what your reasoning is.

No, I was merely giving an example with a random number, but yes, most definitely, your chances to lift head increased when you dropped to the .81

As I said, it's more drastic on the bigger turbos and I don't consider your turbo (single 67) a 'big' turbo. 76+ is more what I was referring to and your drop shouldn't be too big a deal but if you start going too small on the exhaust housing, you will have problems, I'd bet money on it.

 

[jodadejss06gt]

Yeah a little bit of heat should help and you can also spray some pb blaster or something similar down on each plug and let it sit for 10-15 mins first.

Thats exactly what I did. I did about a half a turn and looked down in the holes where I put the PB and saw tiny bubbles so I knew it was going down in there. I turned all the others to the point where I could see tiny bubbles and let it sit.

 

[JeremyH]

No, I was merely giving an example with a random number, but yes, most definitely, your chances to lift head increased when you dropped to the .81

As I said, it's more drastic on the bigger turbos and I don't consider your turbo (single 67) a 'big' turbo. 76+ is more what I was referring to and your drop shouldn't be too big a deal but if you start going too small on the exhaust housing, you will have problems, I'd bet money on it.

Gotcha so why would a slightly smaller turbo exhuast housing increase the chances of lifitng a head? Im curious as to whats gonna cause this at the same boost levels.

 

[Mike Rousch]

Gotcha so why would a slightly smaller turbo exhuast housing increase the chances of lifitng a head? Im curious as to whats gonna cause this at the same boost levels.

The only thing i could think he means is to much back pressure, But imo a 400/500hp car shouldnt have a issue with that anyway.

 

[JeremyH]

That makes sense.

 

[one eyed willy]

i beleive back pressure is what bent my rod on the stock motor.450hp, too restrictive of exhaust....too much heat and hot lapped it.

 

[turbotr]

If you're wondering about exh backpressure, just measure it. It's not hard to do at all. You'll likely have difficulty measuring much of a difference between the .96 and the .81. You will however get the turbo to spool earlier/faster with the .81, with little if any actual penalty in terms of power. It's a win win situation- with better response the car will be faster overall. The first time you get spanked good by a "lesser" car because they jumped out several lengths on you initially (while you waited for your impressive ferris wheel turbine to spool) will help drive the lesson home

Point is, putting up with excess wait is just not necessary. So why do it.

The Ford boards in particular are generally a bit out of whack as far as turbine sizing and backpressure mythology. Historically, the Fords were also very late to the turbo party as well, so not a big surprise either really. Not a dig, just an observation over the years. Que sera.

I measured over 50 psig backpressure on my turbo streeter back in '97, with about 26 psi boost. Backpressure is just a fact of life with streetable turbo setups. That's what powers the compressor (via the turbine). It does not keep you from running successfully, even with a "bad" camshaft choice.

When I was an engine research engineer in the mid/late 90's, we did a closed loop control scheme and EPA emissions project around exh backpressure, using a VNT turbo as the backpressure "actuator". It was an interesting project. When the VNT was closed down, it would spool up some even as the engine was shutting off from idle (lol).

PS- if you upgrade from the old p-trim tech to a GT series based exh side for example, it rewards with major improvements in response and power. I'd never do an old t series turbo lately. The modern stuff IS that much better- it's not a subtle improvement.

TurboTR

 

[one eyed willy]

i ended up measuring mine it was 3x the boost when i started,now its less than 2x with the 3" exhaust and venting to the atmosphere....im using a .81 housing.