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You should be able to run the 2.8 as long as you run a TPS for transmission control. 2.8 and 3.0 blocks are identical externally, so any bolt on components will swap directly.

Depends on the injectors you have, there are multiple types with different specs

Waco1 wrote:Hey does anyone one know the injector nozzle opening pressure for a 1993 4JB1-T? My injectors are at the shop and the tech can't find the spec.
There are multiple injector types for the JB1, opening pressures vary between the different types.

geeves wrote:injector should work. You should also get by with 4jj1 injectors

JJ1 nozzles are not correct, they are designed for a vertical centrally mounted injector not slanted/offset type used in the JB1. This ends up with a very uneven spray pattern once in a JB1 bowl.

geeves wrote:At what point do cranks clutches and gearboxes explode?<br/><br/>Haven’t really found the limit yet, will be either crank or rods.<br/>Clutch is always a problem on these with high torque. Went through a few types, a cushioned ceramic, double diaphragm clutch has been ok so far, but now ...

Roadrunner wrote:I like the black paint, it must be a buzz to drive it, I'd probably drive it everyday too!<br/>So what do you have planned for the next mod?<br/><br/>When I’m not working on it I basically do daily it. <br/>Reached the limit of the current pump, it was only ever built for around ...

A video over the last 5years drag racing progression

[youtube] https://youtu.be/vRWD5n-lrr0?si=-aiPtS0VidZkF5XB[/youtube]

At 3700 rpm you are well past peak torque, they will fall over quickly after that. When you say you blanked off the CSD, what did you do exactly? I believe the CSD solenoid also functions as a metering orifice when not active, so if not replaced with a similar restriction may cause issues with ...

What is your idea of a racing camshaft? There are no off the shelf options for a 4JB1. Need to go to a camshaft manufacture/ machinist that has experience in diesels, give them info of your setup and an educated guess can be made on camshaft modifications. Don’t expect petrol performance cam gains ...

geeves wrote:looks impressive but how does it drive on the road?
Pretty good to be honest, i drive it everyday. It’s still making more torque off boost than peak torque on a stock JB1.