LS376/480 Miata! 415 RWHP/430 ft-lbs - MX-5 Miata Forum

*Jeremy @ FM* · 10th July 2009, 16:58

Hey Guys,

Just finished the 99 LS conversion car with the 6.2L LS3 w/the hot cam. It's pretty insane! Here's the dyno graph vs. a stock 99. LOL What's really amazing is just how drivable this car is- super smooth and quiet. AC blows cold. Suspension & handling are awesome.

That torque curve has a certain resemblance...

(Dyno graph attached)

y8s · 10th July 2009, 17:47

i dunno... only 350 ft-lbs at 2500 rpm?

*Greasyman* · 10th July 2009, 18:01

Quote:

Originally Posted by y8s

i dunno... only 350 ft-lbs at 2500 rpm?

Pffft...weak. Probably take a full half hour to plow an acre with that itty-bitty bit of pull.

Turbonutter · 10th July 2009, 21:40

Quote:

Originally Posted by Greasyman

Pffft...weak. Probably take a full half hour to plow an acre with that itty-bitty bit of pull.

Good thing it ain't in Uncle Jeb's ol' tractor then, eh?

*Steve in Bailey* · 11th July 2009, 02:26

I am not going to call and order one, I am not going to call and order one, I am not going to call and order one, I am remaining calm and enjoying my car, I am not going to call and order one, blast FM ... somebody please help me ...

JasonC SBB · 11th July 2009, 02:39

LOL it makes more power at 2000 RPM than the stock car at 6500 !

silicone boy · 11th July 2009, 03:09

Great work! I was trying to get my LS7 swap done before your event in August so I could drive down, but I think I'll miss it by a month. Maybe next year!

MiataMTF · 11th July 2009, 04:35

MORE pictures!!!

*Jeremy @ FM* · 11th July 2009, 10:45

Quote:

Originally Posted by JasonC SBB

LOL it makes more power at 2000 RPM than the stock car at 6500 !

I tried to start the runs at 1500 RPM but the torque actually overloaded the dyno...

Chi3f · 11th July 2009, 10:49

Nice, my 376/480 car is almost done as well. It is nice to see a dyno run with the same setup.

Looks great.

DougJ · 11th July 2009, 11:56

What's the weight difference between the stock engine/transmission and the LS3? Which trans BTW?

Did you weight the car before and after to see how the weight distribution turned out?

Got a close-up of the engine bay? Looks like a clean install!!!

Doug

frool Prila · 11th July 2009, 12:35

my next miata will have a v8. about the same cost as a nice used c5 but smaller, lighter, and much more unique and a great sleeper factor... until it starts up...

JasonC SBB · 11th July 2009, 13:25

Quote:

Originally Posted by Jeremy / fast13b

I tried to start the runs at 1500 RPM but the torque actually overloaded the dyno...

Eddy current dyno?

Looks like this car would outdrag a stocker starting in 4th!

*Jeremy @ FM* · 12th July 2009, 00:47

It's a Rototest dyno. I was pleased to see the RWHP numbers spot on 15% below the advertised flywheel HP from GM.
http://www.rototest.com/dynamometer/...N=29&Visitor=1

Bill & I spent the afternoon at the shop- the new owner picked up that car and is on his way home. Lucky guy!! I sent him a link to this thread so maybe he'll chime in later.

I don't recall if we weighed this one before and after, but the shop LS1 car (Elvis) picked up 180lbs (came in at just over 2500lbs) and went from 50/50 to 51/49 balance. Only major difference is this 99 has A/C. As far as handling, at lour local track Elvis is running 2 seconds faster than the fastest turbo Miata that's been around the track, and only about a second slower than Bill's turbo Westfield. At the local Corvette Club autocross, Elvis is beating the fastest Vettes by 3-4 seconds. I'd say the handling is spot on.

We're using the T56 6 speed & the CTS diff. Should have more pics up next week. We also just got a MSM with a Holden LS2 on the road, have to break it in before putting it through its paces.

CoralDoc · 13th July 2009, 09:25

Wow! Very nice.

What kind of rubber is Elvis running to get all that power to the ground?

*Jeremy @ FM* · 13th July 2009, 11:06

Elvis runs R888 in 235/45/17.

Here's another pic of the 99-

Diamond Dave · 13th July 2009, 12:41

Quote:

Originally Posted by Jeremy / fast13b

Elvis runs R888 in 235/45/17.

Here's another pic of the 99-

The stories of Elvis are impressive; especially the maiden voygage at the Corvette club autocross.

Forgive my ignorance, but what radiator are you using on this LS3? What engine temps does it stabilize at?

*Jeremy @ FM* · 13th July 2009, 12:53

We're using our aluminum race radiator. Temps seem to be running in the low 200s.

miatex · 13th July 2009, 17:10

It took me a while scrolling down to find the stocker's Dyno!

I am also in the same psychotherapy and meditation to avoid making the call....

Ohhmmmmmm....

miatex

medrvmx5 · 13th July 2009, 21:06

That car sounds so badass. I went to pick up my FM2 car a few weeks ago, and Jeremy started it up for me to hear.

As his quote goes, "When you get bored of your turbo, this is the way to go". If only I won the lottery....................

Tony

*Jeremy @ FM* · 15th July 2009, 11:27

I scanned the dyno chart for those who can't open the Adobe file-

Also here's a pic of how we did the radiator setup. The FM sway bar *just* fits when we use the Comp sway bar brackets and bump them forward just a tad.

DeerHunter · 15th July 2009, 13:15

Quote:

Originally Posted by DougJ

Got a close-up of the engine bay? Looks like a clean install!!!

Having seen this car during its build, I can attest that it's a VERY clean install. John, FM's chief mechanic, is extremely meticulous (some may even say that he's anal).

Nice dyno Jeremy. I like that it actually has a bit of a torque "curve", which should make it more entertaining to drive on the street. I'm sure the owner will be more than thrilled with his car.

EkW · 15th July 2009, 20:54

I had been hoping to see a dyno of the hot cam engine. It looks like the cams put one over the 400 hp at the wheels threshold. Very important when bench racing.
I am getting one of these put in my '95 for 50th birthday this fall. Should have something for which to be very thankful at the end of Nov or beginning of Dec.

Thanks for the pics and chart Jeremy.
Eric

Dizzy · 18th July 2009, 09:53

Quote:

Originally Posted by Steve in Bailey

I am not going to call and order one, I am not going to call and order one, I am not going to call and order one, I am remaining calm and enjoying my car, I am not going to call and order one, blast FM ... somebody please help me ...

We can start a 285 Corridor support group.

I *really* want one of these, but I'm not willing to sell the STi to fund the purchase.

Nice job, FM. That's a beautiful conversion.

Matt Kock · 20th July 2009, 01:17

Even as COOL as my cars is my next NB will have LS POWER! Impressive.

10th July 2009, 17:47	#2
y8s Fifth gear Join Date: Apr 2001 Location: DC, but miss CA! Posts: 4,555	i dunno... only 350 ft-lbs at 2500 rpm? __________________ 2001 Test Mule / Miata Trunk Subwoofer Guide / I support VVT 257rwhp & 226rwtq@9psi. DIY.

11th July 2009, 02:26	#5
Steve in Bailey Supporting Member Join Date: Apr 2005 Location: Bailey,CO Posts: 719	I am not going to call and order one, I am not going to call and order one, I am not going to call and order one, I am remaining calm and enjoying my car, I am not going to call and order one, blast FM ... somebody please help me ... __________________ ________ 99, 410 whp FM Built Engine, E85, FMIIR GT2871R, FM IC, Hydra 2.7, TEIN Mono-Flex, FM BBK, R-Comp's 225/45/15, APR GTC200 Wing.http://forum.miata.net/vb/showthread.php?t=471114

11th July 2009, 02:39	#6
JasonC SBB Overdrive Join Date: May 2000 Location: SJ, Frankenturbo, FCM, AEM Posts: 13,425	LOL it makes more power at 2000 RPM than the stock car at 6500 ! __________________ MELTDOWN: How credit fueled bubbles cause recessions and what we can do about it

11th July 2009, 04:35	#8
MiataMTF Fifth gear Join Date: Oct 2004 Location: Huntington Beach, CA Posts: 3,479	MORE pictures!!! __________________ I'll Keep My Guns, Freedom, & Money. . . You Can Keep The "Change"!

11th July 2009, 11:56	#11
DougJ First gear Join Date: Mar 2009 Location: Prather, CA Posts: 48	What's the weight difference between the stock engine/transmission and the LS3? Which trans BTW? Did you weight the car before and after to see how the weight distribution turned out? Got a close-up of the engine bay? Looks like a clean install!!! Doug __________________ Miata owner since May 17th, 2009. 2001 Emerald Mica LS

11th July 2009, 03:09	#7
silicone boy Third gear Join Date: Apr 2009 Location: Colorado Posts: 854	Great work! I was trying to get my LS7 swap done before your event in August so I could drive down, but I think I'll miss it by a month. Maybe next year!

11th July 2009, 10:49	#10
Chi3f Second gear Join Date: Mar 2008 Location: Maine Posts: 297	Nice, my 376/480 car is almost done as well. It is nice to see a dyno run with the same setup. Looks great.

11th July 2009, 12:35	#12
frool Prila Second gear Join Date: May 2002 Location: Im Riiich, Beeoootch Posts: 132	my next miata will have a v8. about the same cost as a nice used c5 but smaller, lighter, and much more unique and a great sleeper factor... until it starts up... __________________ Welcome, frool Prila. You last visited: 1st January 1970 at 00:00

12th July 2009, 00:47	#14
Jeremy @ FM Sponsor Join Date: Aug 2002 Location: Palisade, CO Posts: 2,181	It's a Rototest dyno. I was pleased to see the RWHP numbers spot on 15% below the advertised flywheel HP from GM. http://www.rototest.com/dynamometer/...N=29&Visitor=1 Bill & I spent the afternoon at the shop- the new owner picked up that car and is on his way home. Lucky guy!! I sent him a link to this thread so maybe he'll chime in later. I don't recall if we weighed this one before and after, but the shop LS1 car (Elvis) picked up 180lbs (came in at just over 2500lbs) and went from 50/50 to 51/49 balance. Only major difference is this 99 has A/C. As far as handling, at lour local track Elvis is running 2 seconds faster than the fastest turbo Miata that's been around the track, and only about a second slower than Bill's turbo Westfield. At the local Corvette Club autocross, Elvis is beating the fastest Vettes by 3-4 seconds. I'd say the handling is spot on. We're using the T56 6 speed & the CTS diff. Should have more pics up next week. We also just got a MSM with a Holden LS2 on the road, have to break it in before putting it through its paces. __________________ Flyin' Miata

13th July 2009, 09:25	#15
CoralDoc Fifth gear Join Date: Jul 2000 Location: Davie, Florida Posts: 2,154	Wow! Very nice. What kind of rubber is Elvis running to get all that power to the ground? __________________ Joshua '93 TTC/SSM Miata '03 S2000

13th July 2009, 11:06	#16
Jeremy @ FM Sponsor Join Date: Aug 2002 Location: Palisade, CO Posts: 2,181	Elvis runs R888 in 235/45/17. Here's another pic of the 99- __________________ Flyin' Miata

13th July 2009, 12:53	#18
Jeremy @ FM Sponsor Join Date: Aug 2002 Location: Palisade, CO Posts: 2,181	We're using our aluminum race radiator. Temps seem to be running in the low 200s. __________________ Flyin' Miata

13th July 2009, 17:10	#19
miatex Fourth gear Join Date: Jul 2001 Location: Caracas, Venezuela. Posts: 1,527	It took me a while scrolling down to find the stocker's Dyno! I am also in the same psychotherapy and meditation to avoid making the call.... Ohhmmmmmm.... miatex __________________ When I hear excuses like: "I don't have the time / I don't have the money" My question is: How much longer are you going to wait to change that?

13th July 2009, 21:06	#20
medrvmx5 Fourth gear Join Date: Nov 2002 Location: Bolingbrook, IL Posts: 1,040	That car sounds so badass. I went to pick up my FM2 car a few weeks ago, and Jeremy started it up for me to hear. As his quote goes, "When you get bored of your turbo, this is the way to go". If only I won the lottery.................... Tony __________________ 2002 Blaze Yellow SE with FM2 Turbo 2007 Firemist Ford Escape Limited

15th July 2009, 11:27	#21
Jeremy @ FM Sponsor Join Date: Aug 2002 Location: Palisade, CO Posts: 2,181	I scanned the dyno chart for those who can't open the Adobe file- Also here's a pic of how we did the radiator setup. The FM sway bar just fits when we use the Comp sway bar brackets and bump them forward just a tad. __________________ Flyin' Miata

15th July 2009, 20:54	#23
EkW First gear Join Date: Jun 2000 Location: Tucson, AZ, USA Posts: 44	Glad to see dyno I had been hoping to see a dyno of the hot cam engine. It looks like the cams put one over the 400 hp at the wheels threshold. Very important when bench racing. I am getting one of these put in my '95 for 50th birthday this fall. Should have something for which to be very thankful at the end of Nov or beginning of Dec. Thanks for the pics and chart Jeremy. Eric

20th July 2009, 01:17	#25
Matt Kock Third gear Join Date: Mar 2007 Location: Houston Posts: 336	Even as COOL as my cars is my next NB will have LS POWER! Impressive. __________________ Black 2003 BEGi S4 302rwhp @ 17 psi, Fully Built motor, 3:63 gears, 6 speed, etc. etc. etc. www.cardomain.com/ride/3079155