LT5 Assembly Project - Page 26 - ZR-1 Net Registry Forums

LGAFF · 11-17-2010

The IH that came with were not siamesed....I will be Siamesing the IHs and Plenum. I am shooting for 500hp(crank), but with that the car will be 3150lbs so I can get by with alittle less if needed, the 2ndry port is fine....primary could use some, but I am not going to puruse it.

Ultimately, this engine(a spare from 90-702) will go into #966.....I will then rebuild #966/port heads, and reinstall it in the car.....shortblock from #702 will probably then go up for sale.

Paul Workman · 11-17-2010

Quote:

Originally Posted by LGAFF

I am shooting for 500hp(crank), but with that the car will be 3150lbs so I can get by with alittle less if needed...

I'm starting to remove extra weight from mine too. I was able to remove over 35# in one area alone...took it off the friggin DRIVER!!

Anywayz...another 500+ hp FBI entry. How cool is that!!??

P.

LGAFF · 11-20-2010

Some Clarity on Lifters

Looks like the INAs are AM.....421 000 110

HT-2236 Lifter is 35MM Diameter 27MM Height

INA 421 000 110 is 35MM Diamter and 36MM Height.

Jagdpanzer · 11-20-2010

Quote:

Originally Posted by tpepmeie

Probably not, unless you do a valve job and sink the valves, or use shims (lash caps) on the tips.

Todd,
I'm planning on using the same light weight INA lifters as you have with stock exhaust and SGC Stage 1 intake cams.
Where is a good source for 35mm bucket lifter shims (lash caps) for 8mm valve stems?

LGAFF · 11-20-2010

http://www.nolimitmotorsport.com/sup...followers.html

LGAFF · 11-20-2010

Alittle note from Pelican Parts Forum on INA lifters, which I believe are the same as ours(Porche 928/944)
http://forums.pelicanparts.com/porsc...ml#post5570254

LGAFF · 11-20-2010

Post on Pelican Parts not to use the INAs, but to use the VW Lifters

Can you go to a solid lifter: http://www.034motorsport.com/engine-...ors-p-629.html

LGAFF · 11-20-2010

In terms of the Cam failures we have seen, maybe we need to touch base with these guys, they use the sames lifters/followers.....and they seem very confident in their regrinds:

http://www.928motorsports.com/parts/camshafts.php

tpepmeie · 11-21-2010

Lee,
Those are not the same p/n INA buckets that I have, but similar in appearance. There are several different ones looking about the same, but varying in weight and application.

The lightweight ones are VW/Audi part 050 109 309HBR. The suffix is important. The INA manufacturer p/n is printed on the underside.

We tested them to over 8000 on the spintron and saw no adverse issues with the buckets.

LGAFF · 11-21-2010

Interesting Article on flat tappet Cams, explores reason for failures, I noticed that the HBR means the tappet was made in Brazil, wondering if you are going to coat them, I am considering having my lifters coated.

11-17-2010	#251
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,180	Re: LT5 Assembly Project The IH that came with were not siamesed....I will be Siamesing the IHs and Plenum. I am shooting for 500hp(crank), but with that the car will be 3150lbs so I can get by with alittle less if needed, the 2ndry port is fine....primary could use some, but I am not going to puruse it. Ultimately, this engine(a spare from 90-702) will go into #966.....I will then rebuild #966/port heads, and reinstall it in the car.....shortblock from #702 will probably then go up for sale. __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

11-20-2010	#253
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,180	Re: LT5 Assembly Project Some Clarity on Lifters Looks like the INAs are AM.....421 000 110 HT-2236 Lifter is 35MM Diameter 27MM Height INA 421 000 110 is 35MM Diamter and 36MM Height. __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

11-20-2010	#255
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,180	Re: LT5 Assembly Project http://www.nolimitmotorsport.com/sup...followers.html __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

11-20-2010	#256
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,180	Re: LT5 Assembly Project Alittle note from Pelican Parts Forum on INA lifters, which I believe are the same as ours(Porche 928/944) http://forums.pelicanparts.com/porsc...ml#post5570254 __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

11-20-2010	#257
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,180	Re: LT5 Assembly Project Post on Pelican Parts not to use the INAs, but to use the VW Lifters Can you go to a solid lifter: http://www.034motorsport.com/engine-...ors-p-629.html __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

11-20-2010	#258
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,180	Re: LT5 Assembly Project In terms of the Cam failures we have seen, maybe we need to touch base with these guys, they use the sames lifters/followers.....and they seem very confident in their regrinds: http://www.928motorsports.com/parts/camshafts.php __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

11-21-2010	#259
tpepmeie Join Date: Aug 2005 Location: Fishers, IN Posts: 812	Re: LT5 Assembly Project Lee, Those are not the same p/n INA buckets that I have, but similar in appearance. There are several different ones looking about the same, but varying in weight and application. The lightweight ones are VW/Audi part 050 109 309HBR. The suffix is important. The INA manufacturer p/n is printed on the underside. We tested them to over 8000 on the spintron and saw no adverse issues with the buckets.

11-21-2010	#260
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,180	Re: LT5 Assembly Project Interesting Article on flat tappet Cams, explores reason for failures, I noticed that the HBR means the tappet was made in Brazil, wondering if you are going to coat them, I am considering having my lifters coated. __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359