LS4 / F40 swap - fieroguru (Page 119/216)
qwikgta JUN 25, 05:21 PM

quote
Originally posted by fieroguru:
Yes.
17x8 45et front and 18x9.5 45et rear
Tires 235/40/17 front and 285/30/18 rear



But can any 88 run that rear rim/tire w/out the mods that you made? would the rim/tire hit in a stock install?

Great read about the HRPT. Someday, someday.....

Rob
fieroguru JUN 25, 09:06 PM

quote
Originally posted by qwikgta:
But can any 88 run that rear rim/tire w/out the mods that you made? would the rim/tire hit in a stock install?



There isn't much special about the front, they should fit any 88, but the clearance is very tight and lowering, camber, toe settings, and centering of the steering rack will all come into play. Most consider a 7" wheel with 48 ET ideal for the 88 front, so this wheel sticks out 15mm further (12.5mm for the extra 1" and 3mm less offset). Opinions will vary... I used to run 245s with 35 ET, so running 235s with 45 et better tucks the wheels in.

On my car, the clearance is about 1/2" to the side of the lateral link (relocation bracket lower 1 end - which makes clearance worse, but that end is also spaced 3/8" inboard, which helps the clearance...) either way, on aggressive autocross events, the tire will rub the side of the trailing link slightly, so I will be making some offset trailing links sometime this summer.


I do have more clearance to the coilover adjuster ring since the top of my struts are relocated 1" inboard, this helps with clearance to the coil overs adjuster ring, but pulls the top of the wheels in further under compression... I also have a couple of areas on the wheel well liner that show some slight rubbing...



However, if you build your coilovers to sit on the original spring perch weld bead (have to run shorter springs), then there is no clearance concerns with the adjuster ring.

Tom Slick is running the same size rear wheel 18x9.5 45et (different style, but same mfg) with a mostly stock 88 rear suspension with the exceptions of coil overs.
Syn JUN 28, 08:34 AM
Did you ever figure out the DOD with the manual? Or is that just kind of an afterthought now?
fieroguru JUN 28, 07:13 PM

quote
Originally posted by Syn:

Did you ever figure out the DOD with the manual? Or is that just kind of an afterthought now?



Nope. It most likely needs the BCM hooked up and the brake switch installed for the E67 to enable DoD. I haven't missed it and over the winter will likely do a DoD delete and camshaft upgrade.
Bob2112 JUN 28, 10:03 PM
If I recall you had posted some good mileage numbers. So those MPG were without DOD? That's pretty good news. There is still that part of me that would love to see it working with the manual trans just to see how much better mpg you could get.

------------------
New Moon Rising - 1988 Black Formula
My Blue Heaven - 1965 Mustang Coupe

fieroguru JUN 29, 09:21 AM

quote
Originally posted by Bob2112:

If I recall you had posted some good mileage numbers. So those MPG were without DOD? That's pretty good news. There is still that part of me that would love to see it working with the manual trans just to see how much better mpg you could get.




I never got DoD to engage with the manual, so all mpg values were in V8 mode. My goal was to break 30 mpg on the interstate and got to 29, but with the wider/stickier tires and the car being more setup for autocross, I have only seen 27.5 mpg recently. Less with the A/C on, but still being able to have 20+ mpg average for my daily commute with 400+ fwhp on tap is pretty good.
fieroguru JUL 24, 04:25 PM
A new tool joined the collection in the garage today. After something like 20 years with my old Larin jack, I finally picked up a new one from Harbor Freight (the Larin jack will still be in the tool rotation).
My primary goal was lower profile and a longer reach so it would be easier to jack up the LS4/F40 Fiero that has been lowered. To use the Larin jack, I would push it in as far as it would go, jack it lightly to slide the tire in, then lower it some (it would now sit higher due to the tire movement), and slide it in far enough to lift on the lower frame rails.

Time will tell how durable this jack is, but I really like the low profile (about 1 1/4" lower than the Larin) and nose length!



Here is what I was after! The jack pad is right under the front lower frame rail:


motoracer838 JUL 25, 08:41 PM

quote
Originally posted by fieroguru:
Here is what I was after! The jack pad is right under the front lower frame rail:




Oh yeah, that works...

Joe
ericjon262 JUL 25, 09:23 PM
pretty sure I have the same jack, it's lifted my 2500hd a couple of times, and my fiero several times, without breaking a sweat...
Neils88 JUL 30, 06:48 PM
How low is that jack? i.e. how much clearance do you need? I'm having real issues with my jack as I build my Aventador...it's just so damn low that I almost can't get the front end jacked up. Right now I can squeeze the jack through the vents in the front bumper...but once the grills are installed that option will go away. Your jack may be the answer...