RB25det 1000HP Build

[Jimefam]

Funny I've talked to rob at rips about getting the correct spark and he has taken the stock coils to 1000whp without issue. If absolutely necessary I'd swap but I'd do all I can to avoid it.

[nissangirl74]

Subscribed. That thing is gonna be amazing when you get finished.

[Eikon]

what level ARP head studs are you using. I've got a friend who maxed out a 26 at about 860 whp because the head studs started to lift on him. To go higher he needed a better set of studs.. they would have been special order for more than $1000 a set.

[Jimefam]

I'm using the regular set of ARP studs. We'll see if it's an issue or not but it's the first I've heard of upgraded arp studs. If I end up having to upgrade though I will. That will not limit me.

[Jimefam]

Ok ok easy guys I admit I was worried about head lift also and if I'm not mistaken the RB25 studs are either shorter or have a smaller diameter so it may absolutely be a problem I encounter. However I have been in contact with several people and companies who have made very high power on these motors and haven't reported that issue so I'm hopeful. It's all relative I guess I mean 4 of my six pistons had busted ringlands @14psi with the stock ecu and we know they can hold up to much higher so I guess sometimes ish happens.

[Eikon]

Ok ok easy guys I admit I was worried about head lift also and if I'm not mistaken the RB25 studs are either shorter or have a smaller diameter so it may absolutely be a problem I encounter. However I have been in contact with several people and companies who have made very high power on these motors and haven't reported that issue so I'm hopeful. It's all relative I guess I mean 4 of my six pistons had busted ringlands @14psi with the stock ecu and we know they can hold up to much higher so I guess sometimes ish happens.

I'm not well versed enough to know if 25s and 26s have the same studs or not. Hopefully the standard ARP studs are fine. I was just bringing up an issue that I've heard in the past so that you are aware and not caught by surprise if it winds up being an issue for you.

[Jimefam]

No I definitely appreciate any feedback and it's something I'll look into further. Rest assured however that I'll upgrade them if necessary as at this point I'm too committed to my goal to not reach for something easily overcome like that.

[Eikon]

I'll email Karl and see if he can give me any more info that might be helpful. I'll see if he's cool with me putting you in touch with him.. he might have some really good insight for you on any other issues you might run into along the way.

I can't wait to see this thing come together. It would be awesome to have 1000 hp RB on NICO. Keep up the good work my friend!

[gmac708]

We will manage...and now we can get back to the build. More updates please!

[AZhitman]

Subscribed. That thing is gonna be amazing when you get finished.

DITTO.

BTW, you're nuts. And that's awesome.

[Jimefam]

We will manage...and now we can get back to the build. More updates please!

Amen! It will be at least 3 weeks more without a substantial update though as I'm still in Houston and then will be in Atlanta only 2 days before driving to Vegas for a week or so. I should have gotten a few more goodies while I've been here so I may throw up some more pics soon but no work till like the 23rd. Next step will be a good one for me though as I decided to ditch the IRS and go with a 4 link ford 9" setup and fully tub the rear. I will hopefully have the cage and new rear end in place by the end of the month and have the car ready for paint and the motor. Stay tuned!

[Cjmartz2k]

Next step will be a good one for me though as I decided to ditch the IRS and go with a 4 link ford 9" setup and fully tub the rear.

Probably a very wise idea. I think even upgraded GTR shafts/diff might have a hard time with that much power if you can make it hook.

[Jimefam]

Exactly, no point making all the power in the world if I can't put it down so a little more work but it'll pay off in the long run. I had a q45 diff axles I was gonna run but I don't have alot of faith in there ability to hold plus to run wide enough tires to actually grip it was gonna need to be tubbed so f it let's go for broke once and for all.

[bmxarmy]

Loving the build man! Sounds like the rbambler though! All of my projects turn out like a snowball! it starts off simple and ends in a full on build! keep up the good work.

nolan

[sickness14]

excellent build! I just moved to Houston a few weeks ago, let me know if you're around. I moved here from NC to attend SAM racing, "school of automotive machinists" , but left my RB25 neo s14 back home for a bit.

-John

[Jimefam]

I received a PM from itsguyguy about the thread but you have your PM's disabled. Enable them so I can reply.

[Omni]

my motivation i love u man...hahaha i got dreams and plans now

[mp3]

Nice build man ! I have a similar build and my car made right close to700hp at 24psi

[Jimefam]

Alright thought I'd post a status update since I haven't been on the forum for a month almost. The last month has been a pain as I've been swamped with work and haven't been in Atlanta. Also I've had a bunch of delays due to unreliable people. I have to say always deal with serious and reputable companies man, I ordered my turbo from a new shop in town on a friends recommendation and what a freaking disaster.

I give the shop the money cash and was told I'd get it in a week, here we are 8 weeks later and after getting every excuse in the book(forgot to order it, lost tracking number, mail delivered it to the wrong address, precision is out of stock) police got involved and I should hopefully get my money Monday. The dry sump pan was supposed to be made by a guy I'd bought stuff from and who fabricates oil pans as a side business. The day I drop it off he tells me he probably will get it done in a week or 2 and I tell him not to worry that proline won't be done for at least two months and I offer to pay upfront because I travel a ton and sometimes I have a friend help me pick stuff up when it's done. He refuses the money and tells me then he'll feel pressured to hurry up(bad sign I should have seen). 1 month and a half after I write him I'm in Atlanta and ask "how goes the pan?", dude writes me back that he doesn't like being pressured and that I need to tell him when I NEED the pan by. I write back like "whoa relax! I told you I wouldn't need it for 2 months and proline won't be done until then ideally I'd like it by then but if not NO problem NO pressure" and he writes me to come pick my stuff up! Whatever still there's plenty of good companies out there, proline has pretty much my motor ready on schedule and under budget. I also bought a bunch of Haltech stuff from Ricky@RawBrokerage and I got everything super fast and correct.

Oh I'll also be going to a Haltech seminar next weekend in Lexington KY. Also since I decided to ditch the IRS and go Ford 9" I thought "screw it let's go full drag car" and since I'm not that interested in bracket racing I've decided to build me a good X275 car and see if I can whip the Turbo'd BB V8's with a third the displacement and a smaller turbo. So that means 25.5 cage, mini tubs, tubed front end and fire suppression systems and other bs. Talked to a local chassis shop recommended by proline but they won't have room in their shop for 6-8 weeks and then need the car for 12 weeks! F that though I'll get the engine and throw it in their work out all the plumbing and run and tune the engine asap that way if I need to do anything else to reach my goal I can get it done before next season begins. I'm hoping to be tuning the car by September then pull it and drop off the chassis to get built and painted by next February. End rant

[Jimefam]

Alright well I've been home for a few days and have the car ready to take tomorrow to the chassis shop. I've also gotten some goodies in and made some changes to the build. I'm switching from the Tomei Solid lifter kit to the Supertech kit. Reason is I wanted longer duration cams with bigger lift and the hydraulic valves weren't long enough. With the Supertech kit I get the longer valve length which enables me to run a much more aggressive cam. Because I'm using a much smaller base circle Supertech is having to make a custom lifter so that will take a few weeks. I also got my new inter-cooler from Australia, I had bought another model but it was rated for 1,000HP and I needed more power to run X275 so I upgraded(I have the 1k one for sale if someone needs a badass drag inter-cooler) Here's a few poor quality cell pictures:

My new Precision PT7685



My PWR Air to Ice Intercooler





My car stripped to a shell





I'll drop it off tomorrow and hopefully have it back in 10 weeks after it gets a 25.5 cage and ladder bar suspension along with a fabricated housing for a Ford 9".

[mixeds14]

this car is goin to be badass... cant wait to see it running

[Yellow4g63]

Where are you going to mount the intercooler?

[Jimefam]

Right in the front where an air to air would be but I'm thinking of laying down the radiator underneath the intercooler at an angle. We will be cutting the front core support off and tubing the front to provide more clearance.

[chad b.]

I was gonna say that those Tomei cams were probably gonna be a bottle neck. I would call Kevin at Kelford. They make a 300+ degree duration cam for race RB setups.

[Jimefam]

Just got back from Aiken, SC after dropping off my shell. What a LONG night, it wasn't in the trailer and prepped until 3am and I was up at 4:30am to get driving. Got to NRC Motorsports early and was able to spend some time going over all the work that I needed and they made alot of helpful recommendations. So beginning next week work commences on the cage first then the rear end and finally tubing the front end. Total build time should be between 10-12 weeks. Pretty excited today as I feel I'm finally getting close.

Car in the trailer


Car right after I dropped it off@ NRC Motorsports ready to get a second life as a (hopefully) 7 second drag car

[bmxarmy]

awesome! I cant wait to see all the work on the shell! keep the updates coming.

nolan

[Beanstalk]

I didn't notice anyone answer your question about the ARP Head Studs. But the Rb26 has 12mm studs and the Rb25 has 11mm. It appears to me the same for the mains as well. However Before my friend at ARP said the main studs were gonna outlast the block itself. He said that at 1000hp the Rb25 block will rip at the girdle. Take it for what its worth. I got too much money wrapped up in my car and too little income to take that with a grain of salt. He said you could have the 26 studs installed fairly easy that guys with the rb30 hybrids do it often. But you should've stayed street not strip

[Jimefam]

Lol well thanks for that. It definitely is gonna be a pure drag car but I guess we'll find out if a good one. Unless I'm mistaken the 25 and 26 have the same main studs but do have different diameter head studs. Actually this was brought up earlier in the thread with Eikon telling me his friend with an RB26 had head lift at around 800whp iirc. That was with the 26 arp studs so it appears there's no cure all. Truth be told by the time I'm done I'll have alot more $$ in the chassis than I will in the engine so I'm prepared to make whatever changes or repairs are necessary. Difference between me and perhaps some people who don't think I should try this is I'm not afraid to try and fail. I will make this car a competitive X275 car and yes there are much easier ways to do it but I'd like to give this one a shot before doing what everyone else does.

[NismoDonkey]

sssssssssubscribed. thrilling build!

[Darius]

The RB26 head studs are larger diameter than the RB25. When guys (like RIPS) do the RB26/30, they drill and tap the block for the larger fasteners. Also, on an application like this, you will want to at least partially fill the coolant passages with resin to prevent deformation/cracking. I don't know enough about this to give you details, but it has been done in drag applications in Australia for a long time.

I'm very interested in this project after seeing it progress. My first thought was this was a pipe dream, but I'm seeing it moving in all the right directions.

Have you had experience with Fuel Injector Clinic for injectors before this? I'm assuming they are redrilled injectors like Deatschwerks, Witchhunter, and Five-o?