Need help with protecting Cylinder #7 for FI.

[IDRIVEAG8GT]

Hey guys.... This isn't really tuning related, I just need help and a how-to. What I've got is a 415CID LS3 at 10:5:1 compression with L92 heads that's going to press a maximum of 800+ horsepower, with about 13-14 Lbs of boost. The general failing of Cylinder #7 comes from heat because it's one of the hardest working Cylinders, the first one to get fuel, and it's the most starved cylinder for Coolant. Keeping this Cylinder cool is number one priority. I've done a little research and am coming up blank. What I need is a crossover steam pipe for the rear of the heads instead of using the block offs, but my issue is that it's got to fit underneath the Magnacharger or go around it or something, and then tie into the front Pipe somehow. Does anyone have anything like that? I don't think the old LS1 4 corner system will fit so I'm kinda SOL. :O

[mecanicman]

I have seen the waterpump tapped and a tee put in with one going to the front crossover and another to an added crossover in the rear. I have not personally worked on this vehicle, but it has been on the street for awhile with 12lbs(IIRC) and is still going.

[carlrx7]

get the injectors balanced, and put the biggest injector in # 7 spot, that way it will get a tad more fuel, richer = cooler.

[IDRIVEAG8GT]

Does the front crossover fit in the rear with a Magnacharger and miss the Oil Pressure sending unit as well? If so that's a big help to me. Good idea on the injector too.

[07MontRedcp]

get the injectors balanced, and put the biggest injector in # 7 spot, that way it will get a tad more fuel, richer = cooler.

Just what I was thinking before I got to your post. Someone one on the corvette forum did the same thing by using a set of flow matched injectors and having one drilled for 10% more flow.

BJK

[IDRIVEAG8GT]

I will do that on the injector, plus I decided to drill/tap the holes in the heads, install fittings, flex line and T into the front vent too. That will give alot of peace of mind.

[starks]

10% sounds like a little overkill.

Are there any other cylinders besides #7 that you need to worry about, but maybe to a lesser degree? It's to bad HP won't let you skew the injectors like you can on 3800 cars.

[ctd]

I know this is not the answer you are looking for, maybe this individaul can offer some ideas.

http://www.kurturbanperformance.com/...or-system.html

[LSX378]

10% sounds like a little overkill.

Are there any other cylinders besides #7 that you need to worry about, but maybe to a lesser degree? It's to bad HP won't let you skew the injectors like you can on 3800 cars.

There is an individual injector flow correction table in the ECM its just not exposed (yet). Drop HPT support a "please include" note with a picture of you on your knees and they may include it in the next beta or two.

They are very good with requests to include stuff if they can fit it in the workload.

[midgetracr]

done

[LSxpwrdZ]

There is an individual injector flow correction table in the ECM its just not exposed (yet). Drop HPT support a "please include" note with a picture of you on your knees and they may include it in the next beta or two.

They are very good with requests to include stuff if they can fit it in the workload.

They told me there is no such table... (on GenIII stuff anyway... the newer stuff I couldn't comment on)

[LSX378]

They told me there is no such table... (on GenIII stuff anyway... the newer stuff I couldn't comment on)

This thread is about Gen IV.

[IDRIVEAG8GT]

done

?

[IDRIVEAG8GT]

There is an individual injector flow correction table in the ECM its just not exposed (yet). Drop HPT support a "please include" note with a picture of you on your knees and they may include it in the next beta or two.

They are very good with requests to include stuff if they can fit it in the workload.

Ah well I would like that to be shown. Just gotta find my camera......

[hymey]

I run colder plugs, run B8EFS with turbo stuff does not effect drivability or fuel economy, I can run more timing and I keep an eye on the number 7. There a tad cold but helps a bunch. The last one I did showed it liked more fuel at the track then the dyno aswell.

cheers

[IDRIVEAG8GT]

It's going to run NGK TR6's, and headers, soooo...... Heat escaping won't be a problem.

[jetttstream]

I know this is not the answer you are looking for, maybe this individaul can offer some ideas.

http://www.kurturbanperformance.com/...or-system.html

I am running that setup but I built my own lines. I like it and from what I understand it is a great solution for coolant flow at the back of the heads.




Also, I ran my lines/hoses under the intake manifold b/c I have an edelbrock ProFlow XT.

If I were to put on a maggie or TVS2300 I would just change the lines and where I mounted the junction box.

[edcmat-l1]

I run colder plugs, run B8EFS with turbo stuff does not effect drivability or fuel economy, I can run more timing and I keep an eye on the number 7. There a tad cold but helps a bunch. The last one I did showed it liked more fuel at the track then the dyno aswell.

cheers

Colder plugs have no affect on how hot or cold the cylinder runs, only the tip of the plug.

[260B4U]

I am running that setup but I built my own lines. I like it and from what I understand it is a great solution for coolant flow at the back of the heads.




Also, I ran my lines/hoses under the intake manifold b/c I have an edelbrock ProFlow XT.

If I were to put on a maggie or TVS2300 I would just change the lines and where I mounted the junction box.

i have seen this done but with hard lines and the hard lines make for a much more clearence friendly install and it was tapped just in front of thermostat to get full flow all the time

[jetttstream]

Well clearance isn't an issue with those if you route the lines on the outside instead of under the intake.

Since I have a decent amount of room I stuff the lines and junction box under the intake is all.