Big cam tpi
Thread Starter
Cruising
Joined: Feb 2026
Posts: 10
Likes: 3
From: michigan
Big cam tpi
This fall/ winter I am planning on building the motor on my 87. It would be a 383 stroker, thinking miniram intake, AFR195 heads, and a cam (Duration 308/316, Lift .555/.555). The reason i am doing this cam and head combo is that it comes as a kit meant for 383s. My newest question is, how am I gonna make this thing run? can the factroty PROM computer handle this? can i find a EPROM wizard and make it work? what do i do if it wont? any help here is greatly preciated.
Team Owner
Joined: Sep 2001
Posts: 62,160
Likes: 1,733
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
The trick these days is finding people who will tune it, but yes it can be tuned with factory ECM. It needs to be done on a dyno and then you need to drive the guy around, all the real work in tuning is in driveability.
Thread Starter
Cruising
Joined: Feb 2026
Posts: 10
Likes: 3
From: michigan
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Drifting
Joined: Jan 2005
Posts: 1,354
Likes: 325
From: San Antonio Tx
With an 87 using an aftermarket ECM would only lose the the mpg/range display. The gauges will still work. Even the speedo works directly off the speed sensor in the transmission.
Melting Slicks
Joined: Jul 2005
Posts: 2,221
Likes: 302
With my own experience on the later 7730 ECMs (which I suspect behave similarly) with my much smaller cammed 383 and another guy I'm helping with a 383 cammed similar to what you're planning... I'm barely able to run closed loop on mine (have tweaked a lot parameters that result in behavior that some might argue isn't even true closed loop anymore)... and on the guy I'm helping I'm pretty much advocating him to just run open loop and tune AFR's via his Wide Band O2.
