So I took the plunge last year and bought my first Mustang - '89 2.3 with a T-5 - to turn it into a weekend/autocross/track car. It's a bit rough - I certainly won't have to worry about cone damage or door dings. I like the underdog 2.3 and when I eventually get to open track the thing I won't mind starting out (again) with less power.
First steps are cleaning and suspension upgrades with some Maximum Motorsports goodies.
---------- Post added at 08:26 PM ---------- Previous post was at 08:23 PM ----------
Here's a pic of the beast. Overall it's in in pretty good shape - mostly straight but some cosmetic damage (driver door is a bit wrinkled) and a few little spots of rust. A supposedly fresh but awful paint job. Mostly it was just filthy dirty inside and out. Have done a lot of cleaning and have a lot left to do.
Also, this car is in better shape than my street car.... Lol my mustang is rough, but it was rough when I got her, and I've driven it for 8 years now. Still going.
Let me talk about the poly bushings for a minute. I've never used them before, and so far I'm a bit disappointed. They were easy enough to install, but once in the control arm the amount of friction/stiction was huge. I could barely rotate the arm.
Did a little research and found many were grinding down the poly part until it was just slightly narrower than the steel sleeve (and by the way, there are different size sleeves front and rear, asks me how i know). That made it better but it still doesn't move as freely as I'd like. I'll give them a try but eventually I'd like to upgrade to the Maximum Motorsports control arms and subframe.
Next up are the MM steering rack bushings. The require you to cut the stock tubes down flush. SN95 rack to match the control arms:
You can do what I did, I took mine, and drilled and tapped the outer shell for the bushing for a grease zerk fitting. Then drill a hole down through the bushing once its in the control arm, and install the fitting. This will allow you to get grease down to the inner sleeve, and help with wear and squeaking. It should also free it up. You don't want them loose either.
Next is fabbing up a front mount. The front heim joint needs to be just above the top of the driveshaft hump to be right around 50% anti squat, which is where all my research says a road-race car should be more or less. I'm going to tie the front mount into the floor at the subframes to try and keep too much force out of the floorpan itself.
---------- Post added at 09:02 PM ---------- Previous post was at 09:01 PM ----------
Very nice, for the lateral location are you using a panhard bar, or watts link?? I suggest watts link for a track car, just because it keeps the axle 100% square in the chassis.
I have the MM panhard bar, got it when it was on sale a while back. I looked at the Fays2 watts link but it was more than double the price. Will be putting the MM piece in soon (hopefully).
I have run numerous NASA events with 4 cylinder Mustangs, they do surprisingly well.
If you're going to run the engine in N/A form, you will quickly find that the fuel system will limit your HP to roughly 115-120ish range, no matter what you do internally. I have successfully used the lower HP turbo ECU's and injectors to push up to 155 HP, before requiring some kind of tuner. Finding a cam that will play nice with factory ECU's can be challenging, hence the HP limit.
Good to hear about the 4-cyl on track because I want to look into doing NASA and some of the local clubs around here. I'd like my boys to do some events when they get old enough and I'm not keen on sending them out with a ton of power underfoot, that's just asking for trouble.
My plan right now is to go carb. Ideally would like 200hp and keep it under 7k rpm.
The carb will really simplify that process. Since HP is a function of engine speed, you will most likely be closer to 7500-7800 RPM @ 200 HP. If you can live with 175-185 HP, your goal is not hard to obtain with bolt on parts and some minor port work. A CR of 11.5-12:1 with the right choice of cam, springs and header can get you in that category. The 350 and 500 CFM Holley carbs work well when mounted via adapter plate to the stock EFI lower intake. An accumulator and windage tray would be good insurance for your type of racing, along with a bronze distributor gear.
I listed some links below, from which I've built several 180 HP engines from. This is a partial list of course.
Might I throw in a suggestion cam wise?? I think the best thing for your desire would be a bo-port complete cam kit. They do complete drop in kits that require no machine work to the spring pockets. I will get a link for you.
Bo does some very nice work that's for sure and is a nice guy too. His head porting is some of the best in the business. I think the cams he sells are aimed at boosted applications and lack the needed duration for Eric's application, unless Bo's introduced something new??
I'm not sure what kind of budget Eric is on for this project, but for my money, the Speedway parts can take you pretty far towards building a good road race engine. The stock 2.3 Rods and crank are plenty strong for this task; a good inspection of the engine, boring of the block and surfacing of the block and head to raise CR plus some balancing will just about complete the build.
BTW Speedway sells a good dual valve spring set for $70.00.
I guess Bo's Stage 3 cam? Bo doesn't list full cam specs, just valve lift, you have to buy the cam I guess or ask someone who runs it. Bo's stage 3 is going to require some additional head work at .550 lift and possibly some longer stem valves for correct geometry or an offset spring retainer depending on what else is done. Once you're in the .550 lift range the accompanying loads and stresses jump up quite a bit, not really ideal on a road race engine which see's sustained rev's, hence my cam suggestion.
In any case, with 185 HP Eric will be blowing past the bottom 3 NASA spec classes; Miata, BMW E30 and spec 944, which are all running less than 165 HP. He just needs to get the weight down below 2400 lbs. It's gonna be a fun ride.
You guys are getting me sidetracked - I need to finish up the chassis first. Don't think I want to build (spend) a 7500 rpm motor the first go 'round. I've been eyeballing OHC's Speedway parts list for a while and will probably move more along that route. Weight will be important, curious to see where it ends up. Main issue is going to be the weight of the driver...
Sorry, not trying to bog you down. Mike and I are just throwing out some ideas for you. I am a NASA racer from, well its inception back when it was still the CA Capri club. What you have there is plenty adequate for a track day car already. Honestly, I would keep it simple for now and just throw out the standard weight reducing items like; interior, HVAC, bumpers and anything else you don't need and call it good for now, but you're not going to like the car very much with just 100 HP in it.
The great thing about the 2.3, is that once you get past the EFI fuel system with a carb, it responds very well to classic mods. If you were to just do the most basic mods, like milling the head .100-110" swapping in this cam Speedway 2.3 Ford Hydraulic Cam, 4000-7200 RPM - Speedway Motors, America's Oldest Speed Shop which is the hydraulic lifter version of the one I posted earlier and installing the stiffer springs I mentioned + the exhaust. You could expect 150-160 HP from your otherwise stock engine, which can take a real beating as long as it stays cool. You will need at a minimum; a carb, manifold and distributor from any 82' or older 2300 equipped car.
I'm just kidding around. The engine is just sitting there and it's tempting to start messing with it just to do something different but I'm trying to stay focused on the chassis. Still lots to be done there.
I did a few experiments with the system about 4 or 5 months ago, but like a lot of my projects, I fell short on time and money and shifted my attention towards some engineering jobs that payed money. It does seem to work, although you have to tension the belt manually. In order for the system to work well, I need to address a few aspects of the actuation system. I tried several actuators, before building my own from scratch. I had it tied into the power steering pump. A Solenoid Operated Directional Control Valve was used to actuate it, via a relay and RPM switch. If you could source all of the parts cheaply and had some basic fabrication skills, it might be a worthwhile project.
• I used a slider cam which was re-ground to 230/230 Duration @.050 Lift , with the gross lift set at .485”
I quickly found that the cam timing transition point was critical with this cam and I never really got it quite right. The engine initially had a huge power dip halfway through its RPM range, until it transitioned.
I degree’d it all over the map and fiddled with the RPM switch in an effort to find a happy spot :headscratcher:. I made it much better, but need to play with it a bit more. It does work, the car idles fairly smooth and once it transitions, it pulls hard up to 7500 RPM. Driving around town it feels very close...errr closer to a stock 2.3
I wish I had half the knowledge you do, I can think of stuff like that, but have none of the required application process to make my ideas work, sorry for the thread jacking, but its been a while since OHC has been on here in any kind of force.
How's the build going? Looks like it's going to be sweet. Are you still working on it?
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Related Threads
?
?
?
?
?
Modded Mustang Forums
6.3M posts
80.3K members
Since 2005
A forum community dedicated to all Ford Mustang owners and enthusiasts. Come join the discussion about performance, racing, builds, modifications, troubleshooting, maintenance, and more!