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Need a new Turbo. by 1fast2m4
Started on: 10-18-2014 10:24 AM
Replies: 16 (488 views)
Last post by: 1fast2m4 on 11-08-2014 09:56 PM
1fast2m4
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Report this Post10-18-2014 10:24 AM Click Here to See the Profile for 1fast2m4Send a Private Message to 1fast2m4Edit/Delete MessageReply w/QuoteDirect Link to This Post
I have a HX40 on the car right now, But I am planing on swapping it out for a more conventional turbo and external wastgate. when looking at turbos for example the Precision 6262 they are available with both a T3 or T4 turbine flange.


Any suggestions as to which turbo to choose would be appreciated. I don't want to build the worlds fastest Fiero but I'd like to be able to run in the high 10's regularly not just that one 10.99 that one time.

------------------
1986 SE 3800SC/4t65eHD (12.871@104.96)
HX-40, FrozenBoost I/C, 80lb injectors & E85 Coming soon.....

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Report this Post10-18-2014 01:21 PM Click Here to See the Profile for IanT720Click Here to Email IanT720Send a Private Message to IanT720Edit/Delete MessageReply w/QuoteDirect Link to This Post
I'm in the same boat, not an insane build but being able to get into the 10's. 6262's are great, a Gt35 is pretty cool, even the Holsets huge, but can work. I think a HE351 is bigger than an HX40? Maybe but if you can figure out the VGT it is pretty killer. Ask Dark. Myself I got a great deal on a Precision P7667. 67mm with a .68AR Exhaust side and T4. I'd only go with a T4 if I were you. With the small exhaust housing on mine it should have some wicked spool. And is quite easy to fit doing a top mount!
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1fast2m4
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Report this Post10-18-2014 05:57 PM Click Here to See the Profile for 1fast2m4Send a Private Message to 1fast2m4Edit/Delete MessageReply w/QuoteDirect Link to This Post
I think the Holset HE351 is basically the same size as the HX40 the main difference being the VGT.

My current setup has NEVER run properly. all signs point to a vacuum leak so I have decided to tear it down to the short block and build back from the heads up. But along with all that my car smokes BADLY coming off boost and it only gets worse the harder I push things. I'm not sure if it's my bargain basement (Chinese/EBAY) HX40 clone or a less than perfect oil drain line setup. Either way I figure if I'm going through the engine I might as well put a "Big boy" turbo on it.

I'm thinking the Precision 6262 with the "S" compressor cover (4.0" inlet/2.5" outlet) and I'm not sure if I want the V-Band inlet/ .82 A/R & V-Band discharge or the T4 Divided .84 A/R with 3 5/8" V-Band discharge Turbine housing.


Comparing Turbine housings, Is a .82ar housing with a T3 flange the same as a .82ar housing with a T4 flange? and what about that V-Band housing. I guess I'll shoot Precision a E-mail or call before I order.

[This message has been edited by 1fast2m4 (edited 10-18-2014).]

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1fast2m4
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Report this Post10-18-2014 06:04 PM Click Here to See the Profile for 1fast2m4Send a Private Message to 1fast2m4Edit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by IanT720:

I'm in the same boat, not an insane build but being able to get into the 10's. 6262's are great, a Gt35 is pretty cool, even the Holsets huge, but can work. I think a HE351 is bigger than an HX40? Maybe but if you can figure out the VGT it is pretty killer. Ask Dark. Myself I got a great deal on a Precision P7667. 67mm with a .68AR Exhaust side and T4. I'd only go with a T4 if I were you. With the small exhaust housing on mine it should have some wicked spool. And is quite easy to fit doing a top mount!


not sure about your definition of "Insane" but that P7667 is kinda "Insane"
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1fast2m4
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Report this Post10-22-2014 10:39 PM Click Here to See the Profile for 1fast2m4Send a Private Message to 1fast2m4Edit/Delete MessageReply w/QuoteDirect Link to This Post
I E-mailed Precision and gave them a quick run down on my car and told them I wanted 500whp all day and 600whp turned up for track days. They recommended there 6266 with the .81 T4 housing. sounds good to me
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BillS
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Report this Post10-23-2014 11:10 AM Click Here to See the Profile for BillSClick Here to Email BillSSend a Private Message to BillSEdit/Delete MessageReply w/QuoteDirect Link to This Post
I ran an IHI turbo for 20 years on mine, but it was set up for reliability, not ultimate power.

If I were going for power today, I'd take a hard look at the BW EFR series - a 6758 might work, but they have a couple of higher output units as well.

Very fast spool with exceptionally light titanium wheels.
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Report this Post10-23-2014 02:51 PM Click Here to See the Profile for darkhorizonSend a Private Message to darkhorizonEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by 1fast2m4:


not sure about your definition of "Insane" but that P7667 is kinda "Insane"


My experience with those is all bark no bite. Its a strong turbo but it will lag a bit and not make much more power than anything else with the same exhaust wheel setup.

An hx40 even from china should still do what you want it to do.

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1fast2m4
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Report this Post10-23-2014 03:05 PM Click Here to See the Profile for 1fast2m4Send a Private Message to 1fast2m4Edit/Delete MessageReply w/QuoteDirect Link to This Post
I know what your saying, but my turbo is smoking BADLY it's fine at idle and cruising and even in boost but as soon as I get out of the boost SMOKE city. BAD

Maybe i'm lifting a head a tad or pushing a head gasket. I'm have fresh heads, gaskets and arp studs going in over the next few weeks. Maybe I'll try my current HX40 with the fresh L26 top end. I do like the internal waster gate and my exhaust is already setup for the Holset

[This message has been edited by 1fast2m4 (edited 10-23-2014).]

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Report this Post10-24-2014 08:30 AM Click Here to See the Profile for darkhorizonSend a Private Message to darkhorizonEdit/Delete MessageReply w/QuoteDirect Link to This Post
I assume you did a boost leak check before?
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1fast2m4
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Report this Post10-25-2014 10:43 PM Click Here to See the Profile for 1fast2m4Send a Private Message to 1fast2m4Edit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by darkhorizon:

I assume you did a boost leak check before?


Honestly, no. I did a standard compression test and #5 Failed Horribly (20-30psi) so I stopped. (i'm assuming bad valve seat) There is no evidence of excessive oil in the cold side of the turbo, Intercooler or intake manifold. would a boost leak check expose a turbo leaking oil directly into the exhaust?

I think I'll wait until the long block passes a compression test before i throw a turbo at it.

[This message has been edited by 1fast2m4 (edited 10-25-2014).]

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steve308
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Report this Post10-26-2014 06:14 AM Click Here to See the Profile for steve308Send a Private Message to steve308Edit/Delete MessageReply w/QuoteDirect Link to This Post
But 1fast 2m4 ---- Who's going to fog for the mosquitoes on the way up to Carlisle next year?
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1fast2m4
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Report this Post10-26-2014 12:17 PM Click Here to See the Profile for 1fast2m4Send a Private Message to 1fast2m4Edit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by steve308:

But 1fast 2m4 ---- Who's going to fog for the mosquitoes on the way up to Carlisle next year?



------------------
1986 SE 3800SC/4t65eHD (12.871@104.96)
HX-40, FrozenBoost I/C, 80lb injectors & E85 Coming soon.....

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Report this Post10-27-2014 02:06 PM Click Here to See the Profile for darkhorizonSend a Private Message to darkhorizonEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by 1fast2m4:


would a boost leak check expose a turbo leaking oil directly into the exhaust?



sorta.

It will check if you are over pressurising the crankcase, and in turn preventing proper oil draining of the turbo... which will come out of the exhaust when it cant go out of the oil drain easily.
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1fast2m4
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Report this Post10-28-2014 03:20 PM Click Here to See the Profile for 1fast2m4Send a Private Message to 1fast2m4Edit/Delete MessageReply w/QuoteDirect Link to This Post
I think your on to something. I hope the head gasket gave out and it's not in the short block
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1fast2m4
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Report this Post10-28-2014 04:15 PM Click Here to See the Profile for 1fast2m4Send a Private Message to 1fast2m4Edit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by 1fast2m4:

I think your on to something. I hope the head gasket gave out and it's not in the short block

edit: i bet that goofy L67 PCV valve is F*ucking me
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1fast2m4
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Report this Post11-08-2014 09:54 PM Click Here to See the Profile for 1fast2m4Send a Private Message to 1fast2m4Edit/Delete MessageReply w/QuoteDirect Link to This Post
Well after having the car 1/2 tore apart and then figuring out what the "Fresh Air" port is and blocking that. everything looks good. I'm kinda depressed I have heads at the machine shop running up a bill.
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1fast2m4
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Report this Post11-08-2014 09:56 PM Click Here to See the Profile for 1fast2m4Send a Private Message to 1fast2m4Edit/Delete MessageReply w/QuoteDirect Link to This Post

1fast2m4

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Member since Feb 2013
 
quote
Originally posted by darkhorizon:


sorta.

It will check if you are over pressurising the crankcase, and in turn preventing proper oil draining of the turbo... which will come out of the exhaust when it cant go out of the oil drain easily.



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