SBE LS1 RX7 Mamo 220 top 500/420
09-07-2017, 02:33 PM
#1
SBE LS1 RX7 Mamo 220 top 500/420 So after having the setup together for almost a year I swapped out the LS1 PCM for a Megasquirt MS3Pro Ultimate.
The MS3 is SUPER easy to tune compared to the LS PCM. +because traction control!
11.56:1 SCR
8.96
CR
93 Octane
NGK 5 plugs (6 heat was too cold for some reason)
SBE LS1. Was freshened up at 30K. Hone and all new bearings. 37k on the motor now.
Comp Custom 225/227-114+3 .614"/.612" LSK lobes (lots o sewing machine) I'll probably be going to a more mild lobe profile shortly.
Mammofied Mamo 220's with hollow intake valves
Yella Ultra 1.7's shimmed for wipe
Manton 11/32" series 4 push rods
Cometic .040" HG
Mammofied Fast 102 intake
Holley 90mm TB
FIC 525cc injectors. Average out to be 602cc @ 4 bar
Sikky swap mid-length headers 3" collectors (pretty sure these are the reason for the weird tq table at 2500)
Dual 3" magnaflow high flow cats
Custom 2.5" dual exhaust
Magnaflow x-pipe muffler
2x Magnaflow 4" round mufflers at the back (still too loud)
Built T-56
Monster LT1-S
3.5" aluminum driveshaft w/ Billet yolk by Driveshaft specialist of Texas (Fantastic service, fast turn-around and great price)
Ford 8.8 IRS w/ 3.55 gears
Aside from the mammofying I've done all the work myself so I'm pretty happy about it.
The dyno is a Maha made in Germany. It's used by most European car manufacturers. 120,000 euro dyno......I paid 300 euro for 8 hours of time. How awesome is that!? Plus the guy helping me was one of the lead tuners in all of Europe. KMS vankronenberg in Holland.
Numbers are SAE corrected. It's a shame we couldn't rescale to 550 on hp and tq.
The dyno was built into the ground and used a platform between the rollers that would lower the car down. This made it impossible to properly load the suspension. Gravity was more than enough to hold the car in place. My biggest issue was that 4th gear would spin and 5th would max out the top speed of the dyno. That's why the pull was only to 6500. I made one pull to 7000 in 4th but it was slipping. The HP didn't even roll over until 68-6900.
The 4th gear pull was looking like around 512-515rwhp....
Who knew WD40 would aid in traction on a dyno.
Sadly, despite the fact that I had my GoPro with me, I didn't take a video. I'm quite disappointed about that.
The MS3 is SUPER easy to tune compared to the LS PCM. +because traction control!
11.56:1 SCR
8.96
CR93 Octane
NGK 5 plugs (6 heat was too cold for some reason)
SBE LS1. Was freshened up at 30K. Hone and all new bearings. 37k on the motor now.
Comp Custom 225/227-114+3 .614"/.612" LSK lobes (lots o sewing machine) I'll probably be going to a more mild lobe profile shortly.
Mammofied Mamo 220's with hollow intake valves
Yella Ultra 1.7's shimmed for wipe
Manton 11/32" series 4 push rods
Cometic .040" HG
Mammofied Fast 102 intake
Holley 90mm TB
FIC 525cc injectors. Average out to be 602cc @ 4 bar
Sikky swap mid-length headers 3" collectors (pretty sure these are the reason for the weird tq table at 2500)
Dual 3" magnaflow high flow cats
Custom 2.5" dual exhaust
Magnaflow x-pipe muffler
2x Magnaflow 4" round mufflers at the back (still too loud)
Built T-56
Monster LT1-S
3.5" aluminum driveshaft w/ Billet yolk by Driveshaft specialist of Texas (Fantastic service, fast turn-around and great price)
Ford 8.8 IRS w/ 3.55 gears
Aside from the mammofying I've done all the work myself so I'm pretty happy about it.
The dyno is a Maha made in Germany. It's used by most European car manufacturers. 120,000 euro dyno......I paid 300 euro for 8 hours of time. How awesome is that!? Plus the guy helping me was one of the lead tuners in all of Europe. KMS vankronenberg in Holland.
Numbers are SAE corrected. It's a shame we couldn't rescale to 550 on hp and tq.
The dyno was built into the ground and used a platform between the rollers that would lower the car down. This made it impossible to properly load the suspension. Gravity was more than enough to hold the car in place. My biggest issue was that 4th gear would spin and 5th would max out the top speed of the dyno. That's why the pull was only to 6500. I made one pull to 7000 in 4th but it was slipping. The HP didn't even roll over until 68-6900.
The 4th gear pull was looking like around 512-515rwhp....
Who knew WD40 would aid in traction on a dyno.
Sadly, despite the fact that I had my GoPro with me, I didn't take a video. I'm quite disappointed about that.
09-07-2017, 11:56 PM
#3
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Nice job man!!!
Seems I've been watching your build forever, but it's awesome to see you put those numbers down!
Congratulations!
Seems I've been watching your build forever, but it's awesome to see you put those numbers down!
Congratulations!
09-08-2017, 12:04 PM
#5
11 Second Club
Nice combo. I would bet that engine drives very nice & also makes great power.
As I have never seen this type of dyno graph I am interested & have a few questions.
Another question is the cam size. A 225/227 114+3, -2 degrees overlap, making 500+ rwhp in a 347?
Looking at the dyno page it seems to have eng. hp, wheel hp, & drag. Adding up the drag & wheel numbers giving you the eng. number. So is the red line supposed to be an engine hp#? With the blue line being the rwhp#?
Please don't take any of these questions/comments in a negative way. This is only because I'm interested. With the heads, intake/exhaust setup you have it sounds awesome. As I said before. I think it will drive nice & make great power. The 420rwtq seems good to me. It's that 500rwhp number that seems a little iffy to me.
Maybe it's the drive line in the RX7. Either way, whatever number it makes, that will be a bad *** RX7. Nice job.
As I have never seen this type of dyno graph I am interested & have a few questions.
Another question is the cam size. A 225/227 114+3, -2 degrees overlap, making 500+ rwhp in a 347?
Looking at the dyno page it seems to have eng. hp, wheel hp, & drag. Adding up the drag & wheel numbers giving you the eng. number. So is the red line supposed to be an engine hp#? With the blue line being the rwhp#?
Please don't take any of these questions/comments in a negative way. This is only because I'm interested. With the heads, intake/exhaust setup you have it sounds awesome. As I said before. I think it will drive nice & make great power. The 420rwtq seems good to me. It's that 500rwhp number that seems a little iffy to me.
Maybe it's the drive line in the RX7. Either way, whatever number it makes, that will be a bad *** RX7. Nice job.
09-08-2017, 03:09 PM
#6
Thanks folks. It wasn't on the Darth budget but I'm pretty happy with how it turned out. Just not the cam love selection.
I think I'd go down the 427 route because RX-7.0 over an LLSR. I'm looking for my cake and want to eat it too. An LLSR setup has a bit more maintenance than I'm after.
End goal is a powerful (550whp) car with a silent valve train and reasonable exhaust.
I think I'd go down the 427 route because RX-7.0 over an LLSR. I'm looking for my cake and want to eat it too. An LLSR setup has a bit more maintenance than I'm after.
End goal is a powerful (550whp) car with a silent valve train and reasonable exhaust.
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09-08-2017, 03:22 PM
#8
The way the Maha dyno works requires two steps. The acceleration and drag on the driveline. The 360 is the acceleration. The 140 is the drag. Add them together you get a more accurate hp rating. It would probably read similar to a dynapac Dyno. It removes the weight of the wheel from the equation. A light wheel will not net you more horsepower.
Considering this is the Dyno most manufacturers use, not just European(found that out today after a little research) I'm inclined to believe these are more accurate than what most are used to at least in regards to numbers the oem's are seeing.
The 3.55 gear, ati balancer, aluminum driveshaft and dual 2.5" exhaust helped as well. My previous setup (diff cam/heads) was 420/375 through a single 3" exhaust.
In the end I'm sure it reads higher than a simple inertia Dyno but that's okay. I was more interested in the curve and if the hp rolled off up top.
No negativity taken.
I have Johnson slr non link bars. My noise is the exhaust valve closing and the headers being made of 18ga stainless foil. Not much I can do but wrap that headers and get a more mild lobe.
Considering this is the Dyno most manufacturers use, not just European(found that out today after a little research) I'm inclined to believe these are more accurate than what most are used to at least in regards to numbers the oem's are seeing.
The 3.55 gear, ati balancer, aluminum driveshaft and dual 2.5" exhaust helped as well. My previous setup (diff cam/heads) was 420/375 through a single 3" exhaust.
In the end I'm sure it reads higher than a simple inertia Dyno but that's okay. I was more interested in the curve and if the hp rolled off up top.
No negativity taken.
I have Johnson slr non link bars. My noise is the exhaust valve closing and the headers being made of 18ga stainless foil. Not much I can do but wrap that headers and get a more mild lobe.
09-08-2017, 03:28 PM
#9
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So you'd read 460-480 on a jet, which is still great in a 225/227 cam. And that's about where I was on my 227/235 cam. You still got something to be proud of.
