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My local AutoX club has its own set of classing and my ‘90 has a fully maxed out suspension, but I still have 2 points to spare before going up a class. It already has an FM cat/mid pipe/axle back. The logical mods are intake, headers, ECU, but each costs a point. So if you can only choose two, which do you choose:
1) Randall intake, RB header
2) MSASM intake + Speeduino
3) RB header + FM Randall intake
With a tuned CAS on factory ECU, you’ll pick up hp above 6000 with a MS by removing the AFM, 5, maybe 10hp. Not 10-15 across the whole rev range though.
personally I’d do a header and exhaust, and wait for intake until I switched to a 1.8 thermostat neck, ditched the AFM, and did a decent intake+ECU.
ECU and then intake if you can use it to get rid of the AFM.
The big difference for the ECU on my car (even with a junk street tune while I was learning to tune it) was the way quicker throttle response and a huge pickup in torque before 4000rpm. Made a huge difference pulling out of slow corners in 2nd gear at autocross. I managed to make 100.6rwhp on 87 with a junk tune, AFM replaced by a piece of 2.5" conduit with the GMIAT in it and an ebay cat back. I could (slowly but surely) reel in stock NA8s in the straights on track.
while my NA still had the 1.6, an ECU, AFM delete and Intake was the first power adder I did to it. Everything else on the car was still stock. I have no numbers to compare it with but there was a noticeable bump in power in all areas. I don't know that I'd call it 10-15 though.
It looks like my post didn't make it through.
Based off of what you said, I think the best mods as far as power is concerned would be an ecu and an intake mod. The advantage of the ecu mod is that you can remove the AFM which is the intake restriction so those mods go hand in hand.
I would suggest the 3d printed intake that Alec Moody developed and posted in a thread here and on the website thingiverse for all of use to download and use on our personal cars. I have one in my miata and I am satisfied with the results.
The 3d intake can be used on a 1.6 engine. Attached is a picture of my engine bay back when I had my 1.6 engine.
Yes, that's the intake that I'll use if I go w/ the ECU+intake. I just priced one out on Xometry and it was $62 for Nylon 12 SLS. I will use your wrapping for some extra integrity and sealing.
Thanks for the info.
Matt.
Originally Posted by andym
It looks like my post didn't make it through.
Based off of what you said, I think the best mods as far as power is concerned would be an ecu and an intake mod. The advantage of the ecu mod is that you can remove the AFM which is the intake restriction so those mods go hand in hand.
I would suggest the 3d printed intake that Alec Moody developed and posted in a thread here and on the website thingiverse for all of use to download and use on our personal cars. I have one in my miata and I am satisfied with the results.
The 3d intake can be used on a 1.6 engine. Attached is a picture of my engine bay back when I had my 1.6 engine.