1HD-T Intake Manifold Modifications

[hybric4x4diesel]

ok, that is fine wait till i post some nice numbers on the dyno & i am telling you that they are better turbos out there where you don`t have to spend that much & yet is as close!. sorry greame nothing personal.and every one over there in aus thaught we canadian`s are that stupid & have no clue on diesel? only dumping fuel is our goal to gain power?i have not seen any vehicle on our canadian soil is fast as you say so.the garret range is only as a guide,for custom build they are tons if one knows how.

 

[TheBigBoy]

You surely cant be refering to the chinese turbo's as stated in this thread. Theres a bunch of blown ones in graemes bin. Don't just post nice numbers. Lets break it down. Full sheets, afr's, boost egt's.

 

[hybric4x4diesel]

on your post #40 you mention, there is nothing on gerrett that matches the g-turbo. you are comparing custom turbocharger with production line on the self .all i am saying is if one`s know how- you can match them up with the right parts.correct me if i am wrong.

 

[wrongway around]

ok i was going to drop out but .here is a little bit of my journey in the last nine months of r&d and daily dynoing. not to say it has been trouble free,but .i feel that my turbo is to good and quite frankly think that i can still have all i need with just a proper matched chinese turbo(at least i hope). my truck is quite fast and again am open to swapping trucks with whatever aussie turboed truck you think might be faster (keep in mind that come tommorow my truck will be running the chinese turbo).right now in 2wd at start i can smoke my 35 toyos off in donuts if i want to ,can cruise the coqahalla hills at what ever speed i want pretty much and can do over 200kmph and im pushing close to 7000 pounds(with winches,armour and full time gear).what do think were just talking turning screws. i bet you noticed the difference when you did you intake mod ,or did you do it at the same time as the turbo too and think its the turbo too(im sure lots of people would like to see the other manifolds you said you have over there forsale at least i would)again link please...your one off turbo is it still a ct26 hybred. sounds like all you need is to turn the fuel screw. there im done .

 

[TheBigBoy]

This isn't an argument. It's tech talk. Over this side of the globe, I am yet to see a turbo that's better matched to this engine (plain and simple). It keeps evolving and getting better and better. We all knew what we wanted. Or better yet what we didn't want. Laggy, non responsive down low, and doesn't run out of boost/while keeping inside its efficency range with no surge. The stock turbo is great. But runs out of puff pretty quick. Most are happy to intercool it and run 14psi (tuned well).

I'm open to all everyone has to offer. But I simply can't see how a cheap Chinese turbo will last. Lists of them blow up over here (bad quality).

 

[TheBigBoy]

on your post #40 you mention, there is nothing on gerrett that matches the g-turbo. you are comparing custom turbocharger with production line on the self .all i am saying is if one`s know how- you can match them up with the right parts.correct me if i am wrong.

Yep, you are 100% right. Only most interchangeable parts have already been tried. All kinds of hybrids and big turbo's. don't ask me how, but Graeme has designed all his own stuff. It's not just parts from another turbo. It's custom machined. I'm sure he will jump on and add further info.

 

[TheBigBoy]

ok i was going to drop out but .here is a little bit of my journey in the last nine months of r&d and daily dynoing. not to say it has been trouble free,but .i feel that my turbo is to good and quite frankly think that i can still have all i need with just a proper matched chinese turbo(at least i hope). my truck is quite fast and again am open to swapping trucks with whatever aussie turboed truck you think might be faster (keep in mind that come tommorow my truck will be running the chinese turbo).right now in 2wd at start i can smoke my 35 toyos off in donuts if i want to ,can cruise the coqahalla hills at what ever speed i want pretty much and can do over 200kmph and im pushing close to 7000 pounds(with winches,armour and full time gear).what do think were just talking turning screws. i bet you noticed the difference when you did you intake mod ,or did you do it at the same time as the turbo too and think its the turbo too(im sure lots of people would like to see the other manifolds you said you have over there forsale at least i would)again link please...your one off turbo is it still a ct26 hybred. sounds like all you need is to turn the fuel screw. there im done .

I never said there where heaps of manifolds here for sale. I linked to the ones on ebay. Everything else including mine is custom made. Ask anyone else here running a Gturbo (who hasn't done the intake mod) for feed back. Infact I don't even know of anyone else who has done this mod with 1?

 

[wrongway around]

i know the gturbo is an excellent product. but as people are starting to toy around with these pumps or what ever mod they try it seems that the intake has never been played with,i think that along with bigger exhaust and inter cooler it might be the right start in any case. if your happy with the extra performance at this level with everything else in stock form internally(turbo or pump)then its perfect. but if someone wants more power . he should not be brain washed to think that only one turbo offers a hp upgrade (just went through this with my torque converter ,it was a numbers thing for me). let alone that a pump upgrade might just do the trick too . i could be all wrong but i am willing to try anything to keep this truck a low budget somewhat home grown backyard beast

 

[ham00]

i know the gturbo is an excellent product. but as people are starting to toy around with these pumps or what ever mod they try it seems that the intake has never been played with,i think that along with bigger exhaust and inter cooler it might be the right start in any case. if your happy with the extra performance at this level with everything else in stock form internally(turbo or pump)then its perfect. but if someone wants more power . he should not be brain washed to think that only one turbo offers a hp upgrade (just went through this with my torque converter ,it was a numbers thing for me). let alone that a pump upgrade might just do the trick too . i could be all wrong but i am willing to try anything to keep this truck a low budget somewhat home grown backyard beast

Wrongway around
(since this thread is way off topic now)
I went this way with my FT powered 80
Intercooler, 3" mandel bent exhaust, Stock factory turbo set @ 14lb & a properly setup & recoed injector's & injector pump + abit of ceramic coating.

On the dyno it doesnt have big KW figure's but it does have massive tourqe numbers. I had my injector pump set up for towing 3.5t & it does it with ease.

It give's the boys in their v8 ute's a scare as i pull away from them at the lights & around round about's.

Most of all, I know it's reliable & will get me to where i want to go & home agian.

Ive had many knocker's, To my findings (most of them with a gturbo)

I would rather see people spend thier $2000 on the injector pump & injector's, Than $2000 on a gturbo & bang 20-24 lb of boost in to a stock motor with a worn out fuel system.
Then tinker with the pump them selfs trying to get it to work.

Hamo

 

[TheBigBoy]

Wrongway around
(since this thread is way off topic now)
I went this way with my FT powered 80
Intercooler, 3" mandel bent exhaust, Stock factory turbo set @ 14lb & a properly setup & recoed injector's & injector pump + abit of ceramic coating.

On the dyno it doesnt have big KW figure's but it does have massive tourqe numbers. I had my injector pump set up for towing 3.5t & it does it with ease.

It give's the boys in their v8 ute's a scare as i pull away from them at the lights & around round about's.

Most of all, I know it's reliable & will get me to where i want to go & home agian.

Ive had many knocker's, To my findings (most of them with a gturbo)

I would rather see people spend thier $2000 on the injector pump & injector's, Than $2000 on a gturbo & bang 20-24 lb of boost in to a stock motor with a worn out fuel system.
Then tinker with the pump them selfs trying to get it to work.

Hamo

Most are happy with a stock turbo, intercooler and tuned properly. But you would have a snow flakes chance against a V8 ute. Unless its a play on words and the V8 ute is a 253 1 tonner from the 1970's and not a LS1 or ford V8.

 

[Dougal]

I would rather see people spend thier $2000 on the injector pump & injector's, Than $2000 on a gturbo & bang 20-24 lb of boost in to a stock motor with a worn out fuel system.
Then tinker with the pump them selfs trying to get it to work.

Hamo

This is the approach I don't understand.
Spend $2k on fuel pump mods when air supply is the bottleneck and fuel isn't!

How many cc/1000 shots are they acheiving with their $2k pump mods?

I'm not saying you should trot out and buy a Gturbo. You can use whatever turbo you want. But if you want to claim you've got results comparable to the Gturbos, you'd better have some data to show it.

 

[TheBigBoy]

I understand what hamo's saying. Injectors is a must if you want to tune it properly. However, you'd rebuild the pump IF it wasn't upto the task of supplying enough fuel for the boost. But you don't know this until you run what ever your chosen boost (regardless of turbo brand).

Back to intake mods. There is hardly any difference in performance between the DT and FT (fact). Although the ft head flows a little better up top. Begs the question, what's better... A FT or a DT with intake manifold mod. Answer - the DT.

 

[ham00]

This is the approach I don't understand.
Spend $2k on fuel pump mods when air supply is the bottleneck and fuel isn't!

Who said i didnt have any intake mods.
Not me!!!!!
& fuel is a problem if your 14 + years old injector pump & injectors aren't up to scratch.

I went this way with my FT powered 80
Intercooler, 3" mandel bent exhaust, Stock factory turbo set @ 14lb & a properly setup & recoed injector's & injector pump + abit of ceramic coating.
Hamo

[URL="http://i1233.photobucket.com/albums/ff395/hamo7/DSCF0640.jpg"][/URL[/URL]]

hamo

 

[TheBigBoy]

Hamo, that's not an intake mod. You using the factor intake manifold flange (cross over pipe flange). Ceramic coating and pretty paint on an intake doesn't add up to anything.

And for 14psi. A 14 year old pump is fine . 25psi is another story.

 

[Dougal]

Who said i didnt have any intake mods.
Not me!!!!!
hamo

You can muck around with intake mods all you like. You'll make about 15% gain tops.
Which is equal in air density in the cylinders to maybe 3psi increase in boost.

Boost is where diesel performance is made or lost.

 

[TheBigBoy]

You CAN NOT do intake manifold mods to a ft. The injection lines go over the top as pictured. The intake mod is good for 20hp at 25-30psi. But what it does do, is improve flow and throttle response (alot).

 

[Dougal]

You CAN NOT do intake manifold mods to a ft. The injection lines go over the top as pictured.

That's not a show-stopper, it's just an extra complication.

 

[TheBigBoy]

It's a show stopper alright. The injection lines are (8mm seamless and lined) special genuine only. And can not be substituted due to the crack pressure of the 2 stage injectors. Believe me, I've tried to replace mine.

 

[Dougal]

It's a show stopper alright. The injection lines are (8mm seamless and lined) special genuine only. And can not be substituted due to the crack pressure of the 2 stage injectors. Believe me, I've tried to replace mine.

What's the crack pressure?

 

[jb BJ73]

I wouldn't be too comfortable using custom injector lines on an engine where they go through a seal in the cylinder head and connect to the injectors internally (like most multivalve Diesel engines). I've had a couple problems with the later Isuzu common rail engines leaking fuel into the oil when I've been forced to try reusing lines. The lines on these engines use a one time crush seal on the pipe.
Although the pressures are way higher than the hdft uses I'd still be very mindful of it