seen better for same, might help to dump those crap piston engine spark plugs

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Yeah man… I need to get that dump valve installed




Isn’t 60-130mph the same as 100-200kph?
I thought it was for us in the Land of the Free

I’ll look at the draggy report it but I think I already deleted.
If so it’ll give a excuse to do another run.

Steve



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100-200 kph is roughly 62-125 mph
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Gotcha.. I’ll do another draggy run 👍

 

don’t forget to turn up teh boosts

on the prior run I was a bit surprised that acceleration in 4th gear (~8 mph/sec) wasn’t better given how strong it was in 3rd (~13.5 mph/sec), assuming it’s a std FD 5-spd

might help to verify rear gear ratio, rear tire size, weight w/driver, etc.
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I'm afraid not but 100-200kph is 62.1 - 124.3 mph if you want to add a custom mode on your draggy.

If you select the unit in metric on your draggy then hit the back button and go into history and then select 100-200km/h it should have recorded that run for you as you already completed the 60-130mph run.

100-200 km/h is the most popular draggy metric so that's what the RX7 Leaderboard reflects. I can easily add a 60-130mph but that one's not so easily comparable cross platform.

 

Found it and converted it, thx for your help!
I’m still a noob with the draggy.

Maybe a sub 5 when I turn the boost up to 24-26psi.. let’s see.

Steve

 

You're Welcome.
The draggy can capture mph and km/h simultaneously and all you have to do is change the metric and go to your history and all runs will be captured there. Outstanding and well done.

That's already faster than my PB, well done mate.
Can you check the below is correct about your car?
Model - RX7 FD3S
Gearbox - OEM 5 Speed
Modifications - Large street port, 8374iwg @22psi
Bhp/HP/PS - 500+?
Fuel - E65
Aux Injection - ?

Absolutely, getting into 5s 100-200km/h will be insane for a street ported car. Keep us posted if you do increase the boost and break into 5s range.
I dont think sub 5s 100-200km/h will be possible by increasing boost a couple of psi but you may break into high 5s.
Sub 5s 100-200 is DCT RX7s with G45/7685 turbo territory with all the juice... 600rwhp plus id imagine.

 

Thats my bad, I meant to say break into the 6's(60-130mph).

Here's my setup..
Model - RX7 FD3S
Gearbox - OEM 5 Spd, Stock diff, 4.10
Modifications - Large street port, 8374iwg @22psi, Rotary Works V- Mount, 3" exhaust.
Bhp/HP/PS - Not Sure, only street tuned
Fuel - E65
Aux Injection - None


Appreciate it
Steve

 

Added you to the leaderboard. Well done you've displaced me from 4th Position. If you get into high 5s range on a 8374 iwg on a streetport....that will be amazing! Do it!
To put your result into perspective, the new £500k 992 gt2 rs runs a 100-200 in 7.5s range. I've put yours down as 550hp as mine was dynoed at 500hp and youve gone 0.3sfaster so on the balance of probability you are somewhere in the 500-550hp range or there abouts imo. If you are able to get a dyno run ill revise the below hp figure to suit.

 

While I appreciate 100-200 is a great test, it just seems to me that it's too fast for anyone to be doing that outside a racetrack. Something like 60-160 would be much more achievable for the average Joe rotary owner. ........ IMO
Not to mention .... this would be the ideal range for those into roll racing

 

stomping on it below 60 kph (2nd gear) is just going to be a bunch of pointless wheel spin for most of the FD3s in this forum area.

you could log a 100-160 kph run and post the time to compare since those numbers are listed separately on the draggy results here. Because that in itself is likely to be where you land in the results order regardless.

let’s see what ya’ got.
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here you go, compiled the 100-160 kph results

some of the draggy results on the 100-200 list aren’t posted in this thread:

100 - 160 kph
no results K24 GTX3584

2.83 sec UK guy G42c-1200

no results S369SX-E

2.91 sec estavan EFR8374

3.45 sec rx7srbad G35-1050

3.97 sec UK guy G30-770

4.94 sec pd_day twins


btw, I must have missed the post on the UK guy with the Garrett G30-770. Those results suck. Brettus dyno’d better with a G30-660 same turbine A/R on an RX8 Renesis engine.
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Understood . Was just suggesting it because roll racing is becoming a 'thing' and second through third is where it's at in those events.
Also ... I don't have draggy or an RX7 so my results wouldn't mean much here, but I did check my logs and 100-160 comes in at 3.8s.. RX8 with g30-660 @ 14psi

 

Agree, 60-160 is practical for roll racing, but it lacks cross-platform recognition. Draggy opts for 100-200km/h and 60-130mph as standardized metrics. While I personally use 50-90mph and 60-100mph for real-world tuning checks validation, 100-200kph has become the new tuning benchmark, offering a potent measure of a car's power without the need for a traditional quarter-mile run.


Guide to Interpreting 100-200kph Times Across Different Platforms:

• 15-20s range: Typically OEM cars with 200-250hp. Stock performance.
  
• 11-14s range: Falls in the 300-400hp category. Decent acceleration.
  
• 8-10s range: Respectable performance, usually associated with 400-450hp.
  
• 6-7s range: Fast category, comparable to Porsche GT3 cars (991-992 generation) with around 500hp naturally aspirated. Suitable for most tracks. 500-600hp
  
• 5s range: Very Fast - approaching warp speed. 700-800hp
  
• 3-4s range: Reserved for drag racing cars or high-budget builds boasting 800whp-1500hp+. Expect warp speed.
  
• 2s range: Exclusive to drag racing monsters with 2000+whp. Spaceship-level acceleration.
  
• 1s range: Achieved by elite 6s 1/4 mile cars. Time travel territory!
  

This provides a broad overview, and actual performance can vary based on the platform.

The RX7's inherent advantage lies in its small and lightweight design, suggesting that, in theory, it should achieve better results with comparatively less power.

This has been proven recently by Steven who ran a 6.26s 100-200 with a 8374 on a streeport with E65 and me running mid 6.5-6.6s range on a G35 1050 on pump fuel showcasing you dont need much to be right up there with 100k Porsche GT or BMW M products and still have a fairly reliable FD without the need for 10k boxes etc etc...all on stock 5 speed and stock diff.

 

that’s why I suggested posting the log time, and you beat the G30-770 result as I commented/expected. Many FD3s here use the RX8 4.444 rear gear and I recall you have the RX8 5-spd with same FD3 gear ratios. If anything, the RX8 is several hundred pounds heavier and not in your favor. Which further emphasizes the FD3 G30-770 result as not being good at all against your Renesis G30-660 result.

Good job!
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Post a Draggy 100-200km see if you can beat that G30 770.
Were you running pump fuel or an ethanol blend?

 

he has a dyno thread on here that proves it, and answers your questions. The other one is FWHP and his is RWHP. He doesn’t have Draggy.

https://www.rx7club.com/rotary-car-p...-dyno-1154187/

in fact he’s giving you a run for your money at the low boost setting. Generally speaking, a 13B REW is not being served well using an open scroll V-band manifold/turbine. You’re power level also isn’t justifying the 1.21 A/R either.
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If divided is needed. This can do it and still keep vband. Assuming of course they make one for the specific turbo at hand.

 

They don't. They ditched this design as it was fruitless compared to T3 or T4, and overly complex to make.

​​​​

 

It's a shame there's no data on draggy for a true comparison between the G30 660 and the G30 770. The G30-770 results are solid using pump fuel and a conservative tune. The link you provided mentions the G30 660 was using E40 fuel, so thats the difference. If switched to pump fuel, the power and torque of the G30 660 will drop away.

I want to highlight that all my results are based on pump fuel and aux injection so the setup has the potential to do much better on draggy by simply switching over to E40-E85 and upping boost to 26-28psi.

Also there is no way the G30 660 can make more boost on a 13b platform safely. The 14.5 psi its running is its high boost setting otherwise why not push higher on E40 fuel?

 

we don't get to pick and choose with the draggy

 

That correct! These are the choices.

As Team, said if you start below 100kph it’s likely gonna end up in wheel spin.
Especially high HP cars.


Steve

 

Tick 200-250kph and 200-300kph....just incase you ever max out 5th....be good to capture those figures as well haha!

 

if anything, it suggests that your large port is maybe not so large, we only had your say so from the beginning.

yes, a G30-660 is going to max out at 60 lb/min ~450 hp who based on the compressor limit, so turning up the boost wick only results in hitting that wall at a lower rpm, and then that’s all she wrote regardless. Which there is a G30-770 and also a G30-900 to address it. The RX8 also has some limitations on a low mount configuration compared to an FD3.

The Renesis also has 10:1 rotors and no overlap port timing. So it has limitations compared to an REW. Strictly from a start speed- stop speed test though, it’s still nipping at your heels despite being maybe 400 lbs heavier - a point missing from your own evaluation. I think you’re missing the overall point though.

Which is, my doubt it will make much difference how high the boost is turned up. Because I not only don’t see your current setup exceeding the capability of a G35-900, my assessment is that a G35-900 with the twin scroll 1.06 A/R housing and proper twin scroll manifold would result in better 100 - 200 kph performance than you’re ever going to see from the G35-1050 with 1.21 A/R housing using the current engine configuration.

There’s an inherent advantage to a twin scroll setup on a 13B with it’s unique 2-rotor exhaust cycle pulsing. Whatever you do going forward, I hope you’ll recognize and take this into consideration.
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