Injectors

Newbies, and basic Stroker Recipes... Get started with your first stroker here!!
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chrismacc
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Injectors

Post by chrismacc »

Hi there, first of all my names Christopher and in no way am I a mechanic (actually a surgeon from costa rica) so you can guess my knowledge here is practically null. The advantage is I have a very good mechanic he was even trained in the states working on monster trucks or what not.
So heres the deal, I have a 4.0 renix thats busted, bought a 4.2 and am using the cranckshaft and conecting rods from the 4.2.

Doing all the rest of the engine and buying the parts, I came up with a question....my injectors. I upgraded to the bosch 0280155746 which made a huuuuuuge diference, but have no idea if these work for my new stroker projec.

I'd really appreciate any help on the matter, just remember I really have no idea how a motor works the newest of the newbies understands more than me hahahahahaha, thank you very much!

***searched around and couldnt find any usefull info around the forum trying not to spam
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Re: Injectors

Post by Cheromaniac »

I'll assume that you have an '87-'90 XJ with a stock Renix ECU and 39psi fuel system.
Here's a small list of Bosch injectors to choose from:

Bosch 0280155712 19.4lb/hr @ 43.5psi
Bosch 0280155703 22.7lb/hr @ 43.5psi
Bosch 0280155715 23.7lb/hr @ 43.5psi
Bosch 0280155849 24.5lb/hr @ 43.5psi (same as Ford XF1E-A5B)
Bosch 0280155784 26.3lb/hr @ 43.5psi

Since it looks like you're just building a mild Renix stroker, I think the 703 injectors will be suitable for your needs.
chrismacc
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Re: Injectors

Post by chrismacc »

That's what im dealing with , you got it!!!

Thank you very very much, injectors ordered, now just waiting for all the parts to arrive, you've helped me a lot!!!
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Re: Injectors

Post by MWManess »

ive heard on upgrading the tank pump for the 24lb injectors, does anyone know which pump will go in as an upgrade?
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Cheromaniac
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Re: Injectors

Post by Cheromaniac »

The stock 90lph fuel pump will do fine.
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chrismacc
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Re: Injectors

Post by chrismacc »

Hi there , well it's done stroked 4.0! But I'm not very sure with the dyno Im getting all the juice out of it.

It peaked at 114 hp with around 194 ft/lb.
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Re: Injectors

Post by chrismacc »

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Randy Bobandi
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Re: Injectors

Post by Randy Bobandi »

chrismacc wrote: November 20th, 2021, 3:55 am
How big are the tires??
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Cheromaniac
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Re: Injectors

Post by Cheromaniac »

chrismacc wrote: November 20th, 2021, 3:50 am Hi there , well it's done stroked 4.0! But I'm not very sure with the dyno Im getting all the juice out of it.

It peaked at 114 hp with around 194 ft/lb.
Those are low numbers but there could be a number of factors at play. Big heavy tires being the biggest one.
Can you post the full dyno graph to get a clearer picture of what's going on?
1992 XJ 4.6 I6 - 5MT - Stroker build-up, Stroker "recipes" Sold
1995 Mustang GT - 4AT - Modded Sold
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chrismacc
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Re: Injectors

Post by chrismacc »

Sorry, never noticed the answers. I dont hace the complete dyno info, and its on 39's...so yeah heavy tires
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