RBambler build thread

[HxC_Nismo]

any updates on the front undertray that you were going to make me?

[AZhitman]

Nolan - Not sure if I mentioned it before, but there's a pretty simple IACV solution you may not have considered, one I successfully implemented on a custom aftermarket manifold on my KA-T in the 'vert.

[bmxarmy]

You never mentioned! due tell!

s*** update for the rbambler. I finally got the rebuild kit for hx35 and when reassembling I snapped the front shaft off while torquing the front impeller. I almost cried, here in Canada, (alberta) we are running short on summer time. I only burned 2 tanks of fuel through the car. I am driving out tonight to meet a guy with another used hx and I plan to rebuild it with the kit and see what happens. Wish me luck!

I need to start my other thread of randomness! Last weekend I went for ride in a guys 8.55sec street car! it was insane!!! He is a local guy buy me does most of the work himself and is a fuel injection genius! Check out his build thread below.

http://ls1tech.com/forums/conversions-h ... stang.html

We share a common interest in ugly old cars....only his is stupid fast! I will update soon, hopefully with the rambler running again.

P.S buddy with the badass street car has a dyno should be logging some time on it soon!

nolan

[bmxarmy]

Dyno session today!!!!!!

Any guess's on a number?

[chad b.]

Super cool build man, props.

@15psi with that turbo on pump and stock cams, I'd say 400 - 420ish on a dynojet maybe

[bmxarmy]

335hp and 287 torque....fairly conservative on the timing. The car pulls super hard at 3800 to 7000. Shifting out of 3rd at 100mph. I am super happy with the car now. It starts idles and runs great. Drives nicely and tame, but when its in boost it is unreal! Ended up making like 12 pulls on the dynojet today. HUGE thanks to neil at horsepower solutions for helping out all day! I will scan my print out from the dyno and up it soon.

nolan

[danielmcn]

what boost was that power made with?

[ninety1two40]

BMX for idle control use the stock AAC, it's only two wires, power and signal. Set the software for PWM and some basic parameters (I can probably give them to you). Pretty easy.

[bmxarmy]

Sounds good I will give it a try come winter, Just to tool around with it i guess and get the pwm set correctly.

All the tuning was done at 15psi.

[danielmcn]

Those numbers seem kinda low to me... Maybe its just the timing.

[bmxarmy]

Yeah like I said we stayed fairly conservative with the timing, i will have to look but i think it was around 18 degrees under boost in higher rpms. What is common timing most people run on these things?

[DLeeTT]

This build is amazing! I wish I had ur fab skills. I saw a rambler on YouTube with an RB in it. I thought this was it. Very impressive work u do. Too bad ur way up in Canada.

[bmxarmy]

Hey all,

I have been busy working a LOT, and havent done much lately. A good friend of mine has his race car in my garage right now and we are going pretty hard on getting it done for spring up here. I also picked up my next project a 92 bmw coupe. gonna have a tt 6.0l ls in it goal is any number above 1000rwhp. It should be fun, I ordered chromoly for the cage this week. gonna make it cert at 8.5 in the 1/4. Build thread here:

http://www.yellowbullet.com/forum/showt ... p?t=434325

my buddys car here:

http://www.yellowbullet.com/forum/showt ... p?t=432473

Back on topic, I have been thinking that the bimmer is gonna take a while to get track ready so maybe put seat belts in the rambler and "freshen up" the engine. The 335rwhp just seems low to me. So I am looking into the help of nico. I would like to spend around the 3g's mark and liven up the ol'rb. My goal would be anything over 500 rwhp. What does everyone think I should, and NEED to do for that. Currently thinking head studs, head gasket, some mild head work, and more boost Currently running 15psi. Also I am going to get rid of the edis coil control system on the mega squirt and run a set of ls coils that I have. Only reason for this is the edis cant 2-step, If it losses a signal it drops to limp mode and you cant retard timing past a set point. ( forget how many degrees off the top of my head)

Let me know what everyone thinks.

Also if anyone wants to sell me some unneeded bits that will help me out.

nolan

Anyways back on topic

[bmxarmy]

Well that was fast!

Just bought arp head studs off DutinZ on the board here. Thanks man!

Anyone care to touch on the other "needed" mods.

[julio]

Well that was fast!

Just bought arp head studs off DutinZ on the board here. Thanks man!

Anyone care to touch on the other "needed" mods.

You will definitely need a bigger turbo for 500rwhp mark on pump gas. I could barely get there with my built rb26 HX40 combo (20psi).

[bmxarmy]

bigger turbo? I felt that the hx was to big, due to excessive lag. I would love to here more incite into this! Once I do rods pistons head gasket and studs I wont be afraid to boost it But still at 22-25psi the thing should be screaming.

What did your rb26 do in the end Julio?

I will likely do meth injection and a bigger turbo to drop IAT's. I also have a super good tuner here and infinite dyno time (dyno-jet) so not worried there.

[robbie2883]

there's a lot of variables to consider when dealing with lag. how was the tune? i.e. timing curve. what kind of boost controller? how long are the vacuum lines? where are you pulling reference source from for the wastegate. etc. manual boost controllers can be rock solid...but nothing compares to a good electronic boost controller when it comes to spool time and rock solid duty cycle curves. i went from spooling a gt35r with a manual boost controller to 12 psi at 5000 to an ebc spooling 18 psi at 3800. something as simple as a good boost controller can make all the difference. timing also plays a huge part in spool time.

another thing to consider is as mention...the turbo. if you want great spool and 500 whp i would HIGHLY suggest a gtx3076r with 82ar turbine housing. i convinced one member on here that this was a good matchup for him and he went for it. 22 psi spooling at 2500 rpms and made 542whp. that wasn't even fully tuned.

last thing to consider is what are you using for tuning. i know you said megasquirt. i'm not a fan though. it's come along way...but the fact of the matter is...everyone loves megasquirt...until they upgrade. then they wake up. it's all relative. i've jsut personally seen too many inconsistencies in the tuning abilities and maps of megasquirt to be much of a fan.

[julio]

bigger turbo? I felt that the hx was to big, due to excessive lag. I would love to here more incite into this! Once I do rods pistons head gasket and studs I wont be afraid to boost it But still at 22-25psi the thing should be screaming.

What did your rb26 do in the end Julio?

I will likely do meth injection and a bigger turbo to drop IAT's. I also have a super good tuner here and infinite dyno time (dyno-jet) so not worried there.

I don't know where your HX35 comes on at, but my setup (T4 HX40, Quick Spool Valve) comes on well before 4k rpms. Can you post a graph of your dyno? 500whp may be possible on an HX35 with meth/cams.

We topped 500whp, but brought it down to 19psi for driving around town seeing as I had a boost creep issue:

[bmxarmy]

pic of the dyno graph will be up monday.

The hx comes on around 3800-4000rpm. and makes boost fast, I am running no boost controller I just have the spring cranked up on the waste gate to 15psi. Seems to work ok, but with the new updates I am gonna keep my eyes open for nice electric boost controller.

[bmxarmy]

Any other input or advice as far as what I NEED to do and what I could do?

I am really thinking I should order up rods and pistons, obviously a new head gasket when I install the head studs. I also plan on removing the humps in the head but nothing else head wise....Unless I NEED to do it to make my 500ish rwhp mark. While its apart I will do a new timing belt tensioner and idler.

Do I need to do the N1 or better oil pump upgrade? Also for the cost should I pick up a water pump? Anything else I am missing?

[TimTurboZ]

Hows the car?

[bmxarmy]

The car is good, Parked away for now for another cold Canadian winter! lol. I just got a new warrantied turbo from turbonetics this week though. Now that I got the oiling sorted out I should be good to go.

I have collected a few things for an engine build since the car has been back on the road and plan on building it up one day. this

The car has had some fun this summer for sure. I changed out the lame flame wheel for a blue flake 3 spoke one to match the shift knob, It has seen 7200 rpm a couple times! lol. And I have loved the mpg she gets. A 1.5 hour road trip cost me 18 bucks of 94 octane this summer! that would have been more like 40 or 50 in the hot rod!



I have been working on my current street/strip car. It is a little off topic for here but if anyone is interested here is the build thread:

http://www.yellowbullet.com/forum/showt ... p?t=434325

I have gotten into composites and carbon fiber as well, I may make some carbon coil covers in the future! I will post some more pics of the rbambler and updates when I put the turbo on it this spring.....

Thanks for following along!

Nolan

[AZhitman]

ALWAYS awesome to hear from you, Nolan... We've shared the RBambler story far and wide... makes everyone smile.

Like I said before, your work inspires me to learn more and more fabrication skills. Thanks for that!