TJW98LS

iTrader: (1)

Now since my 98 model has dual exhaust does that mean if I buy two muffler tips offering fro 24-30 hp EACH does that mean that I could possible climb from 48-60 horses? I just was looking at Muffler tips on Ebay and didn't know.

DaveGS4

iTrader: (2)

Lol, muffler tips will give you zero horsepower. Low restriction cat back or axle-back exhaust will likely only give you 2-3 hp.

Stay away from whomever is selling that stuff for EITHER of your exhaust tips . It's a hoax

Lots of crap out there like the turbinator and 'tornado'
https://www.clublexus.com/forums/sho...ght=turbonator
https://www.clublexus.com/forums/sho...ght=turbonator
https://www.clublexus.com/forums/sho...ght=turbonator
https://www.clublexus.com/forums/sho...ght=turbonator
https://www.clublexus.com/forums/sho...ght=turbonator
https://www.clublexus.com/forums/sho...ght=turbonator
https://www.clublexus.com/forums/sho...ght=turbonator

xirforever

Agreed on the outragious claim of HP for tips... lol

But you will get a lot more than 2-3 HP for a properly made exhaust system from the cats-back with straight through mufflers

EDIT: now that i think about it, if you add tips to your car youll theoretically go slower, lol they do nothing for power, all your doing is adding weight! lol

DaveGS4

iTrader: (2)

Show me a before / after dyno on a 98+ 1uzfe vvti-i motor and then I'll admit I'm wrong

1 - 3 hp at the wheels (so maybe 3 - 4 max at the crank) is all I've seen on many GS members who have done before and after dynos when adding all sorts of quality aftermarket exhaust systems to their GS. The LS could be slightly different, but I doubt its substantial.


Buy the exhaust for the looks and for the sound... but on a car like the 98+ GS400 and LS400, don't buy it for the HP

xirforever

Well i have proof, not dyno as that is not as accurate as my proof. I lost approx. 0.6 - 0.5 seconds in my 1/4 mile. I can guarentee that 2-3 hp did not do this..... lol I have time slips of before and after if you want me to post them... i have them around here somewhere.....

DaveGS4

iTrader: (2)

Oh, and I've got brand new L-sportline cat back exhaust ready to put on my 98 LS400.

If you want to make a wager that you'll pay for both the before and after dynos if its more than a 10hp gain at the crank, I'll take the time to do the before / after dyno when its put on If it's more than 10hp it's on my dime. We'll get an independent third party to hold your funds in escrow.

DaveGS4

iTrader: (2)

Unless you put the exhaust on AT the track on the same day (same track, same temp, same humidity and other conditions etc) and happened to have very similar reaction times and 60ft I'd say thats not a valid test. Any of those conditions will impact your times, some significantly.

Oh and if I read your profile correctly, you've got a 91 LS400, not a 98+. Different car, different engine, different exhaust. I have no experience with that one at all.

xirforever

No offense, but i dont like dyno, take it to the track and run it in the 1/4 mile. If its an auto there isnt too much driver error therefore very accurate results. I would bet that if you had a properly made cat-back exhaust with straight through mufflers, the gain would be more than 2-3. I mean i have PROOF that it took off .6 to .5 seconds in my quarter mile. Im not expert but i know it takes more than 10 HP to do this.

lol this thread is growing more in 5 mins than some do in 5 months... lol

DaveGS4

iTrader: (2)

We'll have to agree to disagree then. Dyno is what all the race shops, tuners and mfgrs use to test their hp increases. I agree proof is in the pudding at the track, but your car runs very differently under changing conditions.

There are many more variables in running at a track on different days. You can have hunderds of pounds difference in the weight of your car from the amount of gas in it, the conditions I listed above, etc.

xirforever

I can live with that, lol. But i always make sure my gas tank is close to empty when i race at the track. So there is one constant.... weight, and thats a doozy (however you spell it)

Also for the record, my car, LS400 91

DaveGS4

iTrader: (2)

THen like I said, totally different car, different engine, different exhaust and I've absolutely no experience with. You might be right on the gains with that one. I'm pretty certain I'm right on the gains with mine.

The post starter (and my) LS400 may look somewhat similar to yours, but the exhaust, engine, performance, etc are substantially different and where I have quite a bit of experience with results of tuning and mods.

I'm still up to take your money for the dyno if you think you're right on the 98+ though

xirforever

To be frank i dont know didly about the 98 VVT-i For a moment i forgot what model LS we were debating over. The first gen LS has an EXTREMELY restrictive exhaust, not sure about the 98...?

TJW98LS

iTrader: (1)

Yea if that's the case, I'm sure the 98 would too. I knew there was a scam there, I didn't know how a muffler tip would provide that much hp. Thanks. That would bring me to my next question. What about a universal muffler since I can't find one made for a Lexus?

xirforever

Your pretty much going to have to have it custom made with universal mufflers, unless you want to pay some outragious price for Lexus performance exhaust. I have magnaflow mufflers on my car.

TJW98LS

iTrader: (1)

I have friends who will do the welding for me, but if I replace them, does that mean I get double the increase of horses than a single? Or does that not change?