What is the ideal 700+ Street Motor

[mick]

Well I finally got cold feet over proceeding with my 42 project. After seeing a few going the same way, now Freighttrain, the writing is on the wall for stock internals and huge torque it seems. I have sourced an LB7 complete runner cheap (for Oz) $US7,500 so am going to take the longer slower road at this stage and still have a good ride on the road with my McRat tune until I build this new motor. I would appreciate some suggestions on an Ideal Build for a (Reliable) 700+ RWHP Motor from some of you people who have more experience with the Diesels. Lets have a few suggestions on a package, like Rods, Pistons, Crank, Cam, Heads, Block Mods etc. I will be starting with a stock 23,000 mile LB7 Motor complete with computer and wiring harness and in the shed I have Twin CP3's, GT42R Turbo, ARP Headstuds, EFI plus few other bits of minor signifigance. Appreciate any who like to contribute -

 

[paint94979]

www.socaldiesel.com would be a great place to start for head studs, heads, and pistons. Good Luck

 

[SmokeShow]

Won't it be somewhat difficult to go from LLY to LB7? Just speculating here as there are probably lots of little nuicances that may rear their ugly faces in the most inopportune times.

C-ya

 

[Mike L.]

If and when I build an engine I will put it in Guys hands. He is what I call sneaky smart. He doesn't get technical too often when we're hangin but if asked; sit down and take notes cause you will not comprihend it all by just listening. :cool2:

 

[mick]

Won't it be somewhat difficult to go from LLY to LB7? Just speculating here as there are probably lots of little nuicances that may rear their ugly faces in the most inopportune times.

C-ya

Possibly - theres always something isn't there? I hear main differences in two are electronics, injectors and turbo. i can't see there would be any impossibilities. Probably go with aftermarket heads and injectors. Turbo would be irrellevant probably go with something pushing the 42 and electronics I have full set of LLY and one of LB7 should be able to make something work. I'm waiting for those that know more than me to come in

 

[mick]

If and when I build an engine I will put it in Guys hands. He is what I call sneaky smart. He doesn't get technical too often when we're hangin but if asked; sit down and take notes cause you will not comprihend it all by just listening. :cool2:

quote - www.socaldiesel.com would be a great place to start for head studs, heads, and pistons. Good Luck

I am leaning that way Thanks

 

[SmokeShow]

Possibly - theres always something isn't there? I hear main differences in two are electronics, injectors and turbo. i can't see there would be any impossibilities. Probably go with aftermarket heads and injectors. Turbo would be irrellevant probably go with something pushing the 42 and electronics I have full set of LLY and one of LB7 should be able to make something work. I'm waiting for those that know more than me to come in

My concern is more with things like the gauge cluster functioning properly since it will be fed info from an ecm made for a different model engine. All that type of stuff.

I'm sure you could build the LB7 short block and then use the LLY stuff on it if you wanted. That would eliminate the elec. hassle.


C-ya

 

[McRat]

If you just got an LB7, you can drive your truck around while you build up the LB7 shortblock. Use the LLY heads though when you are ready for the swap. The injector electronics are different, you will need to run LLY heads or redo all your electrics.

Rods and lower compression at a minimum.

 

[sweetdiesel]

Mick sounds like a great project

and X2 for SoCal diesel

 

[mick]

Mick sounds like a great project

and X2 for SoCal diesel

Yea Sweet Diesel - would be better if i had a little cooler weather like you guys to get into the project - bit warm here at moment around the 100deg(F) 36+(C) Pat indicates around 850 would be feasible with just the 42 so think will stay single instead of twins at this stage. SoCal Stage 2 Heads look good - if used LLY on the LB7 Block as Pat says would fix electrics as you say Smokeshow. Waiting to hear from SoCal at the moment

 

[Trippin]

Mick,

Thanks for the Email and the tip about the thread over here at McRat racing. Sorry for the delay in getting back to you. Racing season is upon us and we are deperately trying to deliver prodcut to all those that called today but need their parts yesterday.

Starting with the Stage 2 cylinder heads we improve the flow by 60cfm on both the intake and the exhaust. Installing a cam to match the new flow characteristics of the cylinder heads as well as your intended use is the next step.

I recommend we lower the compression to approx. 15.5 for a daily driver such as you have described. Ceramically coating the tops of the pistons and applying the dry film lubricant to the skirts will keep the heat out of the crown of the piston under high heat circumstances as well as provide additional lubricity to the skirts.

Hope this helps keep the thread moving. I'd be happy to respond to additional questions.

Guy

 

[dieselson]

I have only heard the best of Guy tripp, one day, maybe this year, I'll maybe do a motor.

 

[mick]

Mick,

Thanks for the Email and the tip about the thread over here at McRat racing. Sorry for the delay in getting back to you. Racing season is upon us and we are deperately trying to deliver prodcut to all those that called today but need their parts yesterday.

Starting with the Stage 2 cylinder heads we improve the flow by 60cfm on both the intake and the exhaust. Installing a cam to match the new flow characteristics of the cylinder heads as well as your intended use is the next step.

I recommend we lower the compression to approx. 15.5 for a daily driver such as you have described. Ceramically coating the tops of the pistons and applying the dry film lubricant to the skirts will keep the heat out of the crown of the piston under high heat circumstances as well as provide additional lubricity to the skirts.

Hope this helps keep the thread moving. I'd be happy to respond to additional questions.

Guy

Thanks Guy for your response. A couple of questions. How much of a package can you supply? I see the Heads, Cam, What about Pistons and Conrods. Also do you retain stock pushrods and what about the block - Do you recommend something extra for sealing ie. Special Gaskets or O Ring or something else? I have always been a Petrolhead remember so excuse some of the questions. Thanks

 

[ecc_33]

i would get don M injectors if doing any injector mods...i have only heard the best from his work...and all yeah trippin is damn good at what he does too

 

[dieselson]

BTW trippin, we will stop by the shop and talk to you about what would be a good engine for us.

 

[02freighttrain]

Sounds like your doing it the smart way. I don't think anyone knows what going to hold up at this point. All we know now is that the rods are a weak link. As Pat suggested lowering the compression ratio should help with cyl pressure. I still say that the key is inj timing and that the solution to getting enough fuel in at the right time. Good luck with the build.

 

[mick]

I go into my shed some days lately and see the Twin CP3s and GT42 sitting there and feel like getting the spanners out and getting into it - Its hard this waiting game. some days I come so close. But Ive resolved myself to waiting to see Pat and a few others on the road with their new powerplants then go for it. Meantime I have an Airbag setup coming over and am building up a 4 link rear end that will all be in within next couple of weeks. Truck will be fairly low - Wheels are getting made at Centreline as we speak 20x15 Rear 20x8 1/2Front. Rear Tyres M/T Sportsman app 17"wide - pic included next to 265 front. Somebody at TDP called Rick said "Why would anybody want to lower a 4x4?" I said because its my truck and I want to, thats what individuality is all about. I like the idea of a low crewcab street truck , big fat rear tyres, stacks, big hp diesel going down the 1/4 in 10's.(in 4x4) Each to his own but thats what I like.

 

[joshdiesel]

I am working with Guy right now as I do my complete rebuild. Nothing but good things to say. Good luck!

 

[MaxFarmer]

Somebody at TDP called Rick said "Why would anybody want to lower a 4x4?" I said because its my truck and I want to, thats what individuality is all about. I like the idea of a low crewcab street truck , big fat rear tyres, stacks, big hp diesel going down the 1/4 in 10's.(in 4x4) Each to his own but thats what I like.

You're supposed to say: "That's how I roll!" :rofl:

 

[mick]

I am working with Guy right now as I do my complete rebuild. Nothing but good things to say. Good luck!

Interested to know what you putting in? I will be starting with guy soon too.


Quote: You're supposed to say: "That's how I roll!"