F.A.Q.    Register    Login    Home Members    Search

Toymods » Tech & Conversions » 1G-GTE GT28 upgrade question Show: Today's Posts  :: Show Polls  Email to friend

Author	Topic
ddeane Regular Location: PNG Registered: June 2002	Re: 1G-GTE GT28 upgrade question Sun, 31 August 2003 01:45 I am currently going down the same track myself. There is no such thing as a GT28 in the Garret catalog! From what I can work out a GT28 is a GT25 with a T3 .60 wheel trim 0.60 A/R compressor housing, 1.83/2.37 wheel diameter, compressor flow of 31 lbs and 0.64 wheel rrim 62 rurbine stage (wheel diamter 1.64/2.09) This turbo is rated at 290hp and will bolt up as a t03/t28 replacement. There is a range of small frame GT25 turbos rated from 350hp to 440hp. Again turbo resalers will fabricate anything you want. However the standard delivery from Garrett references these as the GT25 SB8004 and SB8005 with 350 and 440 hp respectively. These both use T04S 0.70 A/R compressor housings while the smaller has a 0.64 A/R Turbine housing and the larger a 0.86. Between these is a range of turbos designated GT25/35 that use various trim GT35 compressor housings and a range of turbine housings between 0.64 and 0.86. Hp rating is from 350 to 370 and would be constucted to suit varying capacity engines. You then move onto the large frame turbos GT30 etc which use an external wastegate. I run the risk of attracting lots or arguements here 'cos if you look at the catalogs from turbo retailers they list lots of variations to this. They also quote very different hp figures. for example I have seen the GT25 8004 quoted at 350 hp (garrett site) to 400 hp (Ballistic Concepts). 'Spose it all realtes to boost. The advise that I received from my supplier was to go for the GT25 8004 for my 1GGTEU. Basically the comment was that the GT28 combination was 'old technology' and you would only go down that path if you were needing to bolt up to a T03 manifold. Phew! That gets the turbos out of the way. As for the AFM. If you are going after market for the computer you will be able to discard the AFM and move to a MAP sensor. I also plan to replace the throttle body with one off a EB manual Falcon. This gives me a larger throttle body (55mm to 65mm), it bolts up to the original location (need to enlarge the hole and do a little welding) and allows you to get rid of the Toyota Idle Stepper Motor and employ the Ford idle control. Just let your computer supplier know when you are ordering. I also plan to use the Ford Air Tempeture sensor and retain the Toyota water Tempature sensor (let them know this too). With all of this you will need more fuel - higher capacity pump and larger injectors. I plan to use injectors off a 7MGTE. These are 430cc as against 225cc for the gen2 1GGTE and 245cc for the gen3. They are a bolt up and you can use the Gen3 plugs or source plugs off a 7MGTE if you have a gen2. I think that has answered all of your questions. Just one more thing I have also discarded the butterfly(s) on the head side of the inlet manifold and all of the attachments for that. I also got rid of the start injector. Craig [Report message to a moderator]

	Subject	Poster	Date
	1G-GTE GT28 upgrade question	Daemion	Sun, 10 August 2003 00:10
	Re: 1G-GTE GT28 upgrade question	ddeane	Sun, 10 August 2003 00:43
	Re: 1G-GTE GT28 upgrade question	Norbie	Sun, 10 August 2003 01:45
	Re: 1G-GTE GT28 upgrade question	Nark	Mon, 11 August 2003 01:42
	Re: 1G-GTE GT28 upgrade question	Norbie	Mon, 11 August 2003 03:12
	Re: 1G-GTE GT28 upgrade question	CrAiGzEE	Mon, 11 August 2003 03:39
	Re: 1G-GTE GT28 upgrade question	justcallmefrank	Mon, 11 August 2003 08:33
	Re: 1G-GTE GT28 upgrade question	Nark	Mon, 11 August 2003 23:25
	Re: 1G-GTE GT28 upgrade question	Bugman	Mon, 11 August 2003 09:05
	Re: 1G-GTE GT28 upgrade question	justcallmefrank	Tue, 12 August 2003 01:25
	Re: 1G-GTE GT28 upgrade question	Nark	Tue, 12 August 2003 01:33
	Re: 1G-GTE GT28 upgrade question	justcallmefrank	Tue, 12 August 2003 01:35
	Re: 1G-GTE GT28 upgrade question	Daemion	Sat, 30 August 2003 23:21
	Re: 1G-GTE GT28 upgrade question	ddeane	Sun, 31 August 2003 01:45
	Re: 1G-GTE GT28 upgrade question	justcallmefrank	Sun, 31 August 2003 07:57
	Re: 1G-GTE GT28 upgrade question	ddeane	Sun, 31 August 2003 22:16
	Re: 1G-GTE GT28 upgrade question	Bling Bling	Tue, 30 September 2003 14:00
	Re: 1G-GTE GT28 upgrade question	dispatcher	Tue, 30 September 2003 15:56
	Re: 1G-GTE GT28 upgrade question	thechuckster	Wed, 01 October 2003 12:18
	Re: 1G-GTE GT28 upgrade question	CrAiGzEE	Wed, 01 October 2003 14:19
	Re: 1G-GTE GT28 upgrade question	justcallmefrank	Wed, 01 October 2003 00:39
	Re: 1G-GTE GT28 upgrade question	dcving	Thu, 02 October 2003 05:06
	Re: 1G-GTE GT28 upgrade question	justcallmefrank	Thu, 02 October 2003 05:34

Previous Topic:	air flow meter upgrade......
Next Topic:	microtech digi 1??? QUESTION

Powered by: FUDforum 2.3.8
Copyright ©2001-2003 Advanced Internet Designs Inc.