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Posted by: krazykonrad May 8 2006, 08:22 PM

I'm running a 2.3 with (I ASSume) a stock cam. All the original D-jet stuff (for a 1.7) is in place and running well, but a little rough. With the increased displcement should I be running carbs instead of a 1.7 FI?
Many thanks!
Konrad 72/4

Posted by: elwood-914 May 8 2006, 08:29 PM

I'm no expert here but I don't think the stock FI will handle that......I think the stock D-jet will only go up to the 2056cc engine Jake puts out....
but that is with the 2.0 D-jet setup

Posted by: trekkor May 8 2006, 08:29 PM

Posted by: jkeyzer May 8 2006, 08:37 PM

You can adjust the MPS to accomodate the extra displacement. It's a slightly involved procedure and you need some special test equipment to do it right.

Or you can ditch d-jet and switch to Megasquirt, but in the end that will be a lot more work (although the car might run better).

Posted by: Mueller May 9 2006, 12:20 AM

many people have kept the D-Jet and run bigger motors...he already stated the engine runs, it's "rough"...well, that roughness could be attributed to other things besides the displacment increase.

Have you gone thru the normal procedures for tuning and troubleshooting the engine? Ignition in top notch, valve adjust, no vac. leaks, properly operating distributor???

The basics needs to be nailed down first.

A WB02 such as one from Innovate would help and let you know if you are running lean and if so, by how much...

Posted by: So.Cal.914 May 9 2006, 12:43 AM

Depends on what you are useing it for. Alot of guys (and girls) like their FI and wouldn't change it for the world. They run clean and good economy. FI will also, if you sell it, maintain the value of your car. I on the other hand Love my carbsand I to would not trade them for the world. When I went to carbs life became simpler,
plus i didn't have to shift down to first until a much lower speed. I will not start the debate about performance(RUNS FASTER)because that could go on all night. I've
just always aspired to be asperated.

Posted by: Jake Raby May 9 2006, 06:57 AM

2300 with a stock cam......

Someone didn't do their homework-

Posted by: Bleyseng May 9 2006, 07:22 AM

I am sure it will run but how well

The 1700 Djet runners and plenum are sized for the small displacement so 2300cc is beyond its tuning.

What heads are you running? Valve sizes?


Compression?

The cam here is key but the intake system is also part of the configuration.

Posted by: Jake Raby May 9 2006, 07:26 AM

Anything will run....

Posted by: tat2dphreak May 9 2006, 07:34 AM

Posted by: Jake Raby May 9 2006, 08:20 AM

when it makes peak torque @ 1500 RPM and won't make power past 4K- don't gripe!

Posted by: Joe Ricard May 9 2006, 10:25 AM

Jake's Avatar just about says it all.

Posted by: krazykonrad May 17 2006, 09:46 PM

Thanks for the help yall! I'm not sure about many of the spec because the PO had the 2.3 bulit about 8k before I bought it. It may have a stcok cam or not. I do know that its still running a 1.7 intake. I went up to a 2.0 Pressure sensor, but need to get that tuned in as it had the wax plug removed when I got it.
At least right now, it runs great on hot dry days and stalls and bucks on clod wet days. I attribute some to soon to be fixed vacuum leaks but I dont know how much.
If anyone has any additional inpu, please let me know!
Konrad

Posted by: bd1308 May 17 2006, 10:10 PM

yes, I have something to add.

If you dont put in the CORRECT FI system or the CORRECT carb system running a OPTIMUM mix for YOUR displacement, you WILL promptly kill your engine.

I guarantee it--and believe me, i'm on engine three now.

b

Posted by: Mark Henry May 18 2006, 06:45 AM

Put a mega squirt or SDS aftermarket FI system on it.

If you want simple and have the coin the SDS system is the ticket....check out their site even if all you want is some info on PEFI.

www.sdsefi.com