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Yesterday, 07:56 AM
Replies: 3
Views: 245
Posted By MatthewMiller

You're good to go. Rear springs fit all C4s: the...

You're good to go. Rear springs fit all C4s: the 1988 changes in suspension did not require a different spring dimension. So that NYR spring is fine in any C4. It has a rate of 326 lb/in. The...
06-15-2019, 10:47 AM
Replies: 5
Views: 311
Posted By MatthewMiller

All 84-87 C4s use less offset than later ones:...

All 84-87 C4s use less offset than later ones: 38mm for a 9.5" wheel as opposed to 56mm for the later C4s, and 32mm for 8.5" wheels. It looks like your rear Gumby wheels are 10" with 79mm offset,...
06-05-2019, 05:59 PM
Replies: 15
Views: 996
Posted By MatthewMiller

Poly bushings in the rear suspension are always a...

Poly bushings in the rear suspension are always a bad idea. Even if they are in perfect condition, they increase bind over the stock rubber because all those links have to rotate in more than one...
05-28-2019, 09:55 AM
Replies: 14
Views: 1,511
Posted By MatthewMiller

They are definitely ZR1 wheels, and so they will...

They are definitely ZR1 wheels, and so they will poke out on the back of any 88-96 non-ZR1 C4. They would fit well on an earlier C4 if 3/4" spacers are used up front. Or of course they would fit on...
05-27-2019, 12:45 AM
Replies: 9
Views: 540
Posted By MatthewMiller

This is all pretty much correct. The thing about...

This is all pretty much correct. The thing about offset is that if your wheel and tire are narrower than the fender well can accomodate, then you have "fudge factor" in your offset. For example, in...
05-23-2019, 09:29 AM
Replies: 23
Views: 1,478
Posted By MatthewMiller

Some things are a matter of fact rather than...

Some things are a matter of fact rather than opinion. Believing that a wider contact patch means less longitudinal acceleration is factually untrue. It's easy enough to disprove. Also, it's easy...
05-20-2019, 10:52 AM
Replies: 64
Views: 3,240
Posted By MatthewMiller

Well...this topic went pear-shaped with...

Well...this topic went pear-shaped with misinformation in a hurry!

As already noted, this is not true. The Viper is pretty well balanced, and has fat wheels and tires (i.e., lots of grip). The...
05-13-2019, 11:09 PM
Replies: 8
Views: 595
Posted By MatthewMiller

Not new, but maybe newer than 20 years. My...

Not new, but maybe newer than 20 years. My engine was spec'd out 15 years ago, and it's internally balanced. Since you were looking at Summit, here is a list of internally balanced Gen-II 383 kits...
05-10-2019, 08:45 AM
Replies: 14
Views: 486
Posted By MatthewMiller

For high quality and high performance in three...

For high quality and high performance in three seasons, at a reasonable (but not bargain-base) price, it's an easy recommendation.
05-09-2019, 11:58 PM
Replies: 14
Views: 486
Posted By MatthewMiller

Tire choice depends in part on the intended use...

Tire choice depends in part on the intended use and climate for your car. Also, it depends on whether you have the stagger 255f/285r tires and want to stick with those sizes, vs the optional Z07/Z51...
05-07-2019, 08:25 AM
Replies: 3
Views: 307
Posted By MatthewMiller

I replied in the other thread too re the brakes. ...

I replied in the other thread too re the brakes. I like the z26 pads that Powerstop sells, and run them on my 96 for street and autocross use. Powerstop told me they are the same pad material as...
05-01-2019, 08:30 AM
Replies: 13
Views: 672
Posted By MatthewMiller

Are you required to do a tailpipe sniffer test...

Are you required to do a tailpipe sniffer test where you live? If so, that will be the more challenging part. It's easy to get a car to pass the OBD2 scan for emissions compliance.
04-29-2019, 11:11 PM
Replies: 3
Views: 394
Posted By MatthewMiller

I would chose Ridetech over QA1 every time. They...

I would chose Ridetech over QA1 every time. They use a monotube architecture with Fox-branded internals. In addition, they are easily adjustable for rebound so that you can dial them in how you...
04-29-2019, 10:55 PM
Replies: 4
Views: 403
Posted By MatthewMiller

They look correct to me, too. As long as the...

They look correct to me, too. As long as the trailing arm mounts are the same distance away (longitudinally) from the batwing mounts, the angles have to be correct. In this line drawing in plan view...
04-27-2019, 11:46 AM
Replies: 13
Views: 698
Posted By MatthewMiller

I think all of this is excellent advice. ...

I think all of this is excellent advice.

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The short answer is that you could, but you won't get any noticeable gains in mpg from it. However, there may be another important reason to step...
04-25-2019, 09:07 AM
Replies: 53
Views: 2,589
Posted By MatthewMiller

Whew! There's a lot to respond to in this...

Whew! There's a lot to respond to in this thread! The flat crank gives no useful power advantage in this application. None. You can't make headers with long enough primaries to really take...
04-22-2019, 01:11 PM
Replies: 6
Views: 628
Posted By MatthewMiller

Just to add info to the OP's post, Kevko makes a...

Just to add info to the OP's post, Kevko makes a really good product. The friend who built up the engine in my car used to install Canton pans as part of his job, and they had a lot of comebacks due...
04-21-2019, 06:20 PM
Replies: 7
Views: 555
Posted By MatthewMiller

No issues: 17x9.5 et54 will fit well, and...

No issues: 17x9.5 et54 will fit well, and 275/40r17 is the OE tire size for 88-96 C4s with 9.5" wheels at all four corners. The 2mm difference in offset is nothing, and if anything it will look...
04-21-2019, 06:13 PM
Replies: 7
Views: 381
Posted By MatthewMiller

I think this link gives a pretty good overview of...

I think this link gives a pretty good overview of the process: http://www.lt1pcmtuning.com/tips/. If you have a 94/95 then you can use Tunercat for the calibrating and reflashing. If you have a 96,...
04-14-2019, 11:03 PM
Replies: 27
Views: 1,161
Posted By MatthewMiller

I don't know. I haven't seen that, but I haven't...

I don't know. I haven't seen that, but I haven't looked at OE-style repro wheels either. Maybe they are referring to the fact that this size only came on the rear of C5 Z06s?
04-13-2019, 11:12 AM
Replies: 27
Views: 1,161
Posted By MatthewMiller

9" is the minimum recommended wheel width for a...

9" is the minimum recommended wheel width for a 275/40 tire (9-11"). That will work - not ideal for best track times, but it will be fine on the street. This offset will work nicely.


Same as...
04-05-2019, 06:03 PM
Replies: 4
Views: 456
Posted By MatthewMiller

I agree. To add to this, the FSM for my 96...

I agree. To add to this, the FSM for my 96 doesn't have any notes about it being left-hand threaded. You'd think they would say something if it were.
03-30-2019, 01:02 PM
Replies: 16
Views: 518
Posted By MatthewMiller

Every bearing in every kit for ZF6 pull-type...

Every bearing in every kit for ZF6 pull-type clutch is Chinese garbage. So are the pressure plates. Nobody is casting or machining their own anything anymore. The price alone for these things...
03-28-2019, 09:55 AM
Replies: 14
Views: 833
Posted By MatthewMiller

Like the others, I'd suggest pricing and...

Like the others, I'd suggest pricing and comparing both a good aftermarket head like the AFR rklessdriver recommends vs porting your stock heads. I'll recommend another option for porting, which is...
03-26-2019, 09:22 AM
Replies: 33
Views: 1,695
Posted By MatthewMiller

On a 95 it will not trip anything up. On a 96 it...

On a 95 it will not trip anything up. On a 96 it would throw a DTC because they began OBD2 that year, and they began using downstream (after the cats) O2 sensors to detect poor cat and AIR...
Showing results 1 to 25 of 270
 


 
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