fd3sls2

iTrader: (3)

Hello all! I'm just getting around to making a thread to show the potential of using a great combination of parts with the support of someone as knowledgeable as Mr. Mamo himself. I contacted Tony in late winter 2012, after I threw a rod bearing in my stock lower end LS2, and started discussing cylinder heads for my 416. I had already purchased a LS3 bare block, Compstar rotating assembly, and SRP professional pistons. I had some conflicting information on setup and the direction I wanted to go, which Tony, being very informed on this type of stuff, straightened me out. I was looking for mid to high rpm power for my 93 RX7, not caring too much about sacrificing low end, as long as it was "street-able". Mind you, this car weighs approx. 2850# in LS powered trim (maintaining perfect 50/50 weight distribution nonetheless!), coupled with a T56 magnum trans, makes this thing very enjoyable! Mr. Mamo helped me every step of the way with advice, tricks and tips, weather he sold me the component or not. The E-mails went back and forth from the start until completion (November 2012), in a very timely manner for response (not sure when this guy sleeps!). If your thinking of taking the plunge, it would be well worthwhile to seek the assistance of Tony, so you know you'll have a product that performs, and the knowledge to back you when it matters the most! Do it right the first time! (wish I did that years ago). Now for some pictures:

The rebuild...block, pistons, rods, etc...
out with the old in with the new (old block used for a friends 402)






opted not to buy a $600 torque plate and made my own...








Clearances checked, rings gapped, short block assembled


Degree'ing in the Mamo spec'ed cam (248/ 251 114 LSA .623 lift


AFR Heads Courtesy of Tony Mamo (specs: 2.100 Hollow stem intake valve-92g, 1.600 inconel exhaust valves 96g) (AFR's 8019 spring set with titanium retainers)








.040 Cometic gasket to obtain .035 quench, yielding an 11.7:1 static compression ratio, ARP studs were used for clamping.


Both AFR heads installed, Manton 11/32 .120 thick push rods and Yella Terra 1.7 ratio ultra light rocker arms, fitted with 10mm hold down bolts.


Modified windage tray for clearance


Long block assembled




Fabricated motor mounts


Poly mount vs fabricated mount






Monster level 2 twin disc clutch


Verifying balance




Clearance was very tight, ground off the "LSXR" logo, to retain factory hood (Not good times)


Firewall clearance of intake, thank you solid mounts for allowing this to be possible


Radiator and OTR intake (Courtesy of Samberg Performance)






Interior shot...


At the dyno...


Some love




Videos
rx-7 65-170mph

rx7 vs r6

Thanks again for all of your help Tony, it is greatly appreciated and has been a pleasure doing business with you!!! Apologies on the poor quality of the dyno graph, I took a picture with my cell. I will scan the graph at work next week so it is easier to read (Still looks messed up in person). The car did put down some good numbers, but as Tony pointed out, its obvious looking at how rich the A/F ratio goes at close to peak power, there is more to be had! Tony also questioned the amount of timing in the tune. With that in mind, I will be getting the car tuned by someone with more LS experience under their belt, maybe we will see an increase of 10 HP or so..... Fingers crossed! Stay tuned..............

561whp/488tq

Camaro99SS

iTrader: (4)

Very nice! That thing runs like a scalded ape! Nothing like a good n/a setup that would probably give alot of 600+rwhp turbo cars a run for their money from a roll.

Tony put together a 417 for someone back about 2yrs ago with the 230cc V2 heads. You could find it with a search on here, but the cam specs were only slightly smaller than yours, and he did alittle massaging on the heads. It ended up making ~663hp on an engine dyno with a table top flat torque curve. So if you're interested in flywheel numbers, that's about where yours would be. I'm curious now what it'll run in the 1/4!

Jason

Patrick G

iTrader: (14)

Great looking build. Congrats on the performance numbers too.

t_raven

iTrader: (12)

Dayam! I love this style RX7 and want to swap an LS into one so bad. My co-workers and I were just talking about it yesterday. That is one heck of an engine, very nice.

RezinTexas

sweet jesus! great pictures. thanks for sharing.

fd3sls2

iTrader: (3)

Thanks for the comments! Tony had told me about the 417 build, that's pretty much where I wanted to be, except I went with a slightly larger cam. I was just hoping for the same results! I'm really curious what it'll put down with a better tune. It does pull through 7K pretty nicely! The previous engine was a stock LS2 with a 232/238 -112 LSA (.608/.621 lift) cam, with a set of dart PRO1 CNC'd heads (Ported by Joe Mendelis). They were great heads, but entirely too big for a stock cube motor. I acquired one head from my buddy after Joe passed away, and had it "copied", but they never were the same as each other (long story). Due to the "butchered" (my own doing) heads, opted to sell them and go this direction. The LS2 engine put down 445 RWHP and ran a 11.31 @ 124 on street tires (Nitto NT-01's 275/40-17). The engine had valve float issues after 6800 rpm due to the comp shaft mount 1.8 ratio rockers as well. I'm hoping that I can run a 10.5- 10.7 with the current LS3/ AFR setup... I think that's an obtainable goal.

Knight-Z06

what an awesome build , congrats on your numbers

yonerhottlt1

iTrader: (21)

That is a badass car with a badass motor!

dhctss

iTrader: (3)

that engine is insane man am I jealous lol.

wesam

Nice build man keep the good work
I noticed the AFR curve need some work i think you will gain ~20 hp/tq when you lean it after 4600 rpm

fd3sls2

iTrader: (3)

Lets hope so!

adamantium

iTrader: (3)

Wow everything about it is perfect! Im a huge fan of the RPF-1's! Sick car! Sounds very deep, whats the exhaust setup?

fd3sls2

iTrader: (3)

It has 1-7/8 long tube headers, that Y together and go straight out to a Greddy Titanium (7lbs) muffler. No cats...it would be hard to do a tru dual setup because the gas tank is offset to the drivers side of the car. Plus, with the "ricer" fart can...and the "Rotary Performance" plate frame.....noone would ever expext the pain train that is under the hood..lol! (At least until it fires up)

usafcrewchief01

iTrader: (5)

Hell of a build bud... You should build me a 402 setup. Oh wait you did.. Kudos good sir! You're a badass

fd3sls2

iTrader: (3)

Thanks sean! Im glad you enjoy it! Show Italy what american muscle is....lol. Thank you for serving our country!..

zkeller

iTrader: (9)

nice build! Tony is the best. My 434 build in my FD is a monster. I see you dynoed a Dave's. Dave has been doing a ton of LS swaps. A little work on your mad table will put those afrs were they need to be.

fd3sls2

iTrader: (3)

Thanks! Tony is amazing!! Im really glad I opted to go that route, he was a pleasure to work with. Yea ive been going to daves (KD rotary- now Speed. 1) for quite some time, but when I showed up for dyno this time, dave wasnt there- brian (IIRC) was. Ive only had dave touch my car till then, but after driving 3.5hrs, I wasnt going home untuned. It runs better than it did, but as you can see, the A/F ratio isnt desireable.
Brian did a decent job, but left some power on the table. I guess thats better than blowing it up....lol

fd3sls2

iTrader: (3)

Update: I will be going to New England Dyno tomorrow to have Kevin Hagerty (recommended by Tony) re-tune the car... results to follow.....

turbotalon1g

This is my dream build, very nice work and power.

Burken01

iTrader: (88)

Very impressive.