Im number 18!!!

jbrady - great work with these headers.

gawd - awesome pics of the install. It will definitely help us all out.

 

No. 23!

First: Thank You jbrady, and here's to your mom!

Second: Is there any way the manufacturer can rig the EGR flange for my '93 SC to the new header? I suppose he would need to have a '93 manifold available to even consider it. They charged me for the EGR flange and $23 EACH for the adapter flanges. Seems rather steep to me.

Third: They indicated this run would be 30 sets.

Comments?

 

This is fascinating... all the replies and info- just terrific. I look forward to seeing dyno results.

One note: I would reset the ECU so the computer can "re-learn" the engine's newfound breathing capabilities. MagnaFlow recommends this on many applications- for example, on the Mini Cooper S, if you don't reset the ECU after the exhaust install the gain are minimal. If you reset the ECU and let the car re-learn for about 200 miles, they see an 18hp gain at the wheels!!

I suspect the Lexus V8 computer needs to similarly re-learn... reset the ECU, drive it for a while and THEN dyno it.

Also, I would recommend the OE manifold gaskets- these crush-type gaskets are the way to go. No point in chancing an exhaust leak after all that installation work!

I am seriously considering these... and chance I can get a pair uncoated? I am considering welding small brackets to the headers to attach the OE heat shields. I wonder if they are even CLOSE to fitting... Of course, I would have them coated after I did my thing- have a great local shop here for this.

I also have dyno access- would be happy to get some numbers before & after.
I can call in a favor and get free dyno time. Car has SRT intake... might be interesting.
Please let me now about availability (time).

-Bob

 

Yeah no doubt! We should collectively cover the cost of his set, installation and tuning just for his patience in putting up with so much shiite !!! LOL

I'd seriously be willing to make a small contribution to the JBrady Fund

 

Bob,

You should be able to order a set uncoated. The stock GS400 heat shields from 1998-2000 physically fit over the headers. gawd has a picture of just that above. Welding on brackets would work but not simple to do. The drivers side will be very close and may not clear the steering column. I guess you could cut the shield away around the column. I would still have them coated after you are done to preserve the metal and prevent corrosion as well as keep the heat where it will do the most good... maintaining velocity. All of this would have added substantially to the cost and is not needed from a function standpoint.

 

You guys are great. I was not asking but who am I to say no?

Anyone wishing to send something via paypal is welcome.

In fact I will send the first $75 of whatever is sent to gawd to help with the dyno run.

Paypal jebrady@ev1.net

 

Or do you guys just ignore those of us asking fair questions?

Couldn't help but notice two questions from two posters about heat shields got ignored by the powers that be in order to respond to those hijacking the thread.

Why?

One wonders why some get so frustrated, and why some of us read only what they want to hear.

 

If you're referring to me as the 'powers that be', you should send that question to me via PM (please read the forum rules). I had a valid reason to moderate the thread because of the off topic / repetitive nature of much of the conversation and the number of email notices it generates to members. If you want to comment on my approach, do it in private.

I'm not ignoring any questions, I simply don't know the answer to them or I would have posted. So you will continue to be frustrated until someone who knows can answer them. This is brand new ground for all of us, so you may be SOL until somebody actually buys & tries with your same model.

 

Seriously, I just feel you deserve an applause for having the tenacity and perseverance to accomplish a task that you emarked upon back in 2003 I believe!!

A small contribution I feel is the least I could do to give you well-do respect for your efforts- regardless the outcome of any performance gains!!

JB- check your paypal my friend!!

 

hey Dave are you doing it ??

i was just thinking of the work involved for our setups

most likley the removal of the SC and all that happy stuff

just curious if any of the FI guys ave bought a set yet

 

This is very nice of you guys, it would definitely offset some of the cost and could get me a step closer on getting the y pipe project finished with John. I'm coordinating with some local CL members to do some dyno runs early next week, so if we could raise enough, I'll go ahead a dip into next months mod budget and get the y-pipe welded up for comparison.

That would free me up for the next project, I found someone who can hack the GS400 ECU codes. So we may be one close to getting rid of hitting the rev limiter and speed governor. I gotta tell you 135 with 3.76 gears and JB headers bites!!!

 

No way did you really ..more info on this please

 

I thought Jbrady fielded the question fairly well, you have to understand even though the headers are a universal fit on the Lexus V8, the heat shields are not. For instance, the manifold from a GS400 is a dual pipe like the one pictured above, but the GS430 has a single pipe with most likely a smaller heat shield. So making heat shields for each model will be an experiment for each model until the first one of each is completed succesfully. MY advice would be to coordinate with someone on the list that has the same model as you and proceed from there.

 

Johnny- I'm #8 on the list

 

FF,

I do not understand your concern/frustration. I have addressed the heat shield situation multiple times including yet again just a couple of posts up.

98-99 heat shields physically fit. gawd has pictures. I posted pictures of the prototypes with heat shields. There are no mounting tabs to secure them. This would have added considerably to the cost.

Regarding the flanges at $23.50 each. At this price Loren will not even offer a dealer discount. This is very inexpensive for low volume production 3 bolt flanges in 3/8" steel. All 1990-1997 car owners will need these to build downpipes. This was explained in a number of places and via email. The EGR flange at around $5 is cheap and needed for anyone wanting to keep EGR on the same year cars. This flange will need to be welded into the downpipes and aftermarket flex line installed from the new EGR location to the factory EGR engine location. Again, describe in email and in ths thread.

You are not ignored, I try to answer as many questions as I can even if repetative.