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post #1 of (permalink) Old 09-28-2001, 05:47 PM
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o.k., i just read a web site that sells Zuk aftermarket stuff...they did a build up of a Zuk, and the first thing they did was use a header/exhaust upgrade...they said it ran worse..anyone out there with a stock 1.3, stock carb, and header/exhaust combo that can provide info? i'm within days of doing a power upgrade, either carb, or exhaust, and would like some info or help please...thanks guys

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post #2 of (permalink) Old 09-30-2001, 12:35 AM
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Re: headers

I have done the exhaust thing twice now.Ihave a Hedman headerand i went with a 2 1/4 Dynomax high flo muffler an a 2 inch pipe I did loose power. Then we tried a 2 inch baffled resonator and a 2 inch blow through resonator and a y after that and down to 2 1 7/8 tail pipes. It sounds real good but not too loud. They seen to need back pressure and as for the header I only gained fuel mileage, no real horse power gain noticed.

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post #3 of (permalink) Old 09-30-2001, 02:53 AM
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Re: headers

Well I'm still with the stock carb (Live in CA) but I have motor upgrades. .020 over with a cam Ported and polished head.

I also Have a Doug Thorly Tri Y header-2" high flo cat-2" Flowmaster.
I it run's like a little red race car.......on 33's

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post #4 of (permalink) Old 09-30-2001, 05:59 AM
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Re: headers

ive got a pacesetter on mine and a pony and i can tell the differnece

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post #5 of (permalink) Old 09-30-2001, 09:27 AM
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Re: headers

I have an '86 with all kinds of mods and an '88 almost stock. Thorley headers made a big difference in performance on both.

post #6 of (permalink) Old 09-30-2001, 11:17 AM
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Re: headers

I have an '88 ragtop with the Calmini header and a '86 hardtop with a DT header. Both have 2" exhaust with new cat, high flow muffler and K&N air filters in stock air box. I only noticed marginal performance gains with both setup.

I have heard knowledgeable people say that a free flowing 2" exhaust with stock exhaust manifold will gain you as much as with headers on the Samuari. However, I sure like the go fast look of headers.

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post #7 of (permalink) Old 09-30-2001, 03:14 PM
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Re: headers

The first mod I did on my '88 was a Thorley, new Cat, flow-through muffler all tied together with 2.25" exhaust pipe.

For whatever unknown reason, I noticed a positive change in performance.

Not long after, the engine started to go south (it was ready and the problem was not related to the exhaust system).

I rebuilt a spare block with +.40 high-compression pistons and installed it with the same exhaust system. I have about 3200 miles on this new engine and it runs exceptionally strong.

I would go with the exhaust header and a little more open system. Like other have said, don't open it up too much! the engine does need a bit of backpressure. It's the most bang for the buck!


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post #8 of (permalink) Old 09-30-2001, 05:52 PM
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Re: headers

gotta pace setter on mine even though it is EFi I can tell a difference I think its the pipe size you run that matters!

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92 Zuki/235's/header/cherry bomb exhaust/Still Building
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post #9 of (permalink) Old 09-30-2001, 06:16 PM
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Re: headers

i started with a pacesetter, then switched to a dt. they only difference between the two the doug is just better for hooken up the exhaust up to. the pacesetter comes out real close to the frame. then i went from a high flow cat back to a stock one, the high flow makes a stock carb run real real rich. but with both i stay with the hardcore muffler. the dt header sounds more ballsey. with the pacesetter at high revs i did like the sound.

Thanks fer your time,

Jimmie & MONZUKI

"God doesn't have to hand out brains everyday."

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post #10 of (permalink) Old 09-30-2001, 06:26 PM
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Re: headers

thanks guys...i think for now i'm just gonna slap a heddman, with a 2" cherry bomb....save up money for complete cat-back exhaust later...what do you think?[img]/wwwthreads_images/icons/wink.gif[/img]

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