Reverie Daytona Induction System

[theob]

Yesterday was THE DAY!

I dynoed my car and you can find the astonishing dynochart below.

The dynometer used was a Dynapack 4000 which measures flywheel power.

My performance mods up to now are:
1) Lotus Stage 2 exhaust
2) Reverie CF Daytona 230CX Induction Kit
3) Reverie CF Intake Duct (Side scoops will be fitted very soon)

So, down to figures now.

Max output: 210,3 PS @ 7800rpm (flywheel)
Max torque: 20,87Kg.m @ 6750rpm.



Unfortunately I didn't have sufficient time to dyno the stock filter too, but will eventually do so later on.

[eliseowner2b]

You either got one hell of a good motor or those mods are making approx 20 hp right? It's early and I may be missing something here.

[theob]

Originally posted by eliseowner2b
You either got one hell of a good motor or those mods are making approx 20 hp right? It's early and I may be missing something here.

Maybe both!?!



Anyway, for those who'd like to have a clip you can find it here (wmv, 2.5MB).

[eliseowner2b]

Nice. Ill take one.

[pianomaniac]

fuel: regular unleaded?

[Stan]

Do you have a stock baseline Dyno for your car, before the mods that is...

[shay2nak]

damn! 20hp! Pretty sweet!

Do you have to run another dyno to simulate a hot engine or warmer weather to see if the gain is constant?

[Lotus F1]

Hey Guys.... DYNO CHARTS MEAN NOTHING WITHOUT A BASELINE FOR COMPARISON. Actual HP #'s have little meaning. I cannot imagine one could get that much performance from already tweeked 4 cylinder engine. The days of easy strap-on high HP mods ended years ago with bigger and less complex engines. I think a ECU tweak would be needed for a true 20 HP gain on this kind of engine.

[shay2nak]

Originally posted by 1FASTMX5
I cannot imagine one could get that much performance from already tweeked 4 cylinder engine. The days of easy strap-on high HP mods ended years ago with bigger and less complex engines. I think a ECU tweak would be needed for a true 20 HP gain on this kind of engine.

Lotus only tuned the ECU, everything else is stock toyota. I hope we can get 20 hp from an intake and new manifold/exhaust.

[theob]

Originally posted by pianomaniac
fuel: regular unleaded?

In Greece, you can find the following gas to fuel your Elise:

1) Regular Unleaded (95RON)
2) Premium Unleaded (98 RON)
3) Shell V Power Racing, BP Ultimate 100, and other local "distiller's" 100 RON unleaded fuel.

Originally posted by stan
Do you have a stock baseline Dyno for your car, before the mods that is...

Unfortunately, I didn't dyno it before the mods, and fitting back and forth stock filter and exhaust would be a rather costly job now.

Originally posted by shay2nak
Do you have to run another dyno to simulate a hot engine or warmer weather to see if the gain is constant?

I did three consecutive dyno runs, and the dyno readings were constant (plus-minus ca.1%). The engine didn't seem to experience any heat soaking, while the ext. temperature was 15oC.

Originally posted by 1FASTMX5
DYNO CHARTS MEAN NOTHING WITHOUT A BASELINE FOR COMPARISON. Actual HP #'s have little meaning. I cannot imagine one could get that much performance from already tweeked 4 cylinder engine. The days of easy strap-on high HP mods ended years ago with bigger and less complex engines. I think a ECU tweak would be needed for a true 20 HP gain on this kind of engine.

Indeed they mean nothing alone, but I finally decided not to consume more time and money on the dyno, since another guy here had dynoed his car with a QS (very similar to Stage2 exhaust). So, basically a baseline to compare my dyno plot DOES EXIST! I measured flywheel power output (PS), and if the other Elise guy will give us a comparable chart, the problem is solved, without double the "R&D" from my side!

As Shay2nak correctly said, the engine is a Toyota drop-in, and only the ECU was tweaked by Lotus.
As shown, there are some gains to experience from that factory tweak. If my dyno readings are a bit optimistic or the specific engine performs a bit better or any other combination that may drag the power curve just a bit higher doesn't alter the fact that the combination of the Lotus Stage 2 exhaust and the Reverie Induction system simply rocks!

It's not something that has only been drawn on a paper but also a feeling all my codrivers and I have experienced when upgrading the respective stock parts, especially the filter, were the snail and the clumpsy airbox were replaced by the beautiful Reverie airbox and the side intake duct, hence actinng basically like a ram tube .

In the next dyno session I'll check Komo-Tec's exhaust manifold and sport cat!

Stay tuned!

[shay2nak]

do you remember what the dyno read from the other guy's elise off the top of your head?

What if we install larger fuel injectors and throttle body? Could we get another 5-10 hp?

My goal is to get the car to 230hp by installing intake, headers, sport cat & exhaust, maybe throttle body and injectors.

Then to get the car to 1850 lbs and I will be content.

[theob]

We'll keep in touch shay2nak and you'll see that your vision may become reality soon!!

[eliseowner2b]

I am leaning in this direction as well. I've had turbo cars in the past and although the turbo from forcedfed sounds great I can't help but wonder what the Elise would be like with a tweaked n/a engine. 230hp doesn't sound unreasonable and reliability is very important to me if I am going to be driving up to 6 hours from home to attend track days.

[Lotus F1]

[i]Originally posted by theob

Indeed they mean nothing alone, but I finally decided not to consume more time and money on the dyno, since another guy here had dynoed his car with a QS (very similar to Stage2 exhaust). So, basically a baseline to compare my dyno plot DOES EXIST! I measured flywheel power output (PS), and if the other Elise guy will give us a comparable chart, the problem is solved, without double the "R&D" from my side!
[/b]

A Dyno plot from a different car from a different dyno on a different day, with different mods means little. U at minumum need to have the results from the same dyno on the same day. What needs to be compared directly is the difference in the values and not the total values. I would love for this to be true, however the method being used now really says little. Do u know any one that has a stock Elise that can Dyno his car on the same one you did?

Either way I do appreciate you sharing your experiences with this upgrade

[Ruediger]

Originally posted by 1FASTMX5
A Dyno plot from a different car from a different dyno on a different day, with different mods means little. U at minumum need to have the results from the same dyno on the same day. What needs to be compared directly is the difference in the values and not the total values.

well said !

[Evl]

Originally posted by 1FASTMX5
A Dyno plot from a different car from a different dyno on a different day, with different mods means little. U at minumum need to have the results from the same dyno on the same day. What needs to be compared directly is the difference in the values and not the total values. I would love for this to be true, however the method being used now really says little. Do u know any one that has a stock Elise that can Dyno his car on the same one you did?

Either way I do appreciate you sharing your experiences with this upgrade

I'd say its more important to have the same car than the same day, as long as you have all of the relavant atmospheric conditions. There can be significant differences in output from the same engine based on manufacturing tolerances. Granted, this might not be such a big issue with modern manufacturing, but I would still expect it could easily swamp the measured output difference seen from an exhaust, for example.

[qball]

I think some are being a bit unrealistic. I am sure it takes time to make these modifications.

For somebody to dyno their stock car one day, and make all of the modifications (e.g., install the new muffler and the Reverie intake system, tune) and then dyno the car the same day, under the same conditions, is a bit unrealistic.

I do think it's important to dyno the SAME car, but not necessarily on the same day.

Noting temperature, pressure, and humidity differences on the comparison plots is important too.

[Lotus F1]

Originally posted by kellzey
I think some are being a bit unrealistic. I am sure it takes time to make these modifications.

For somebody to dyno their stock car one day, and make all of the modifications (e.g., install the new muffler and the Reverie intake system, tune) and then dyno the car the same day, under the same conditions, is a bit unrealistic.

I do think it's important to dyno the SAME car, but not necessarily on the same day.

Noting temperature, pressure, and humidity differences on the comparison plots is important too.

Agreed. Same day is not very important but same car and dyno is.

[ChrisH]

Or, take the scientific approach in situations like this. Use a second car as the comparison. Take two cars, dyno both back-to-back a few times under different conditions. Get a good comparison. Now modify one of them, then dyno the two cars back to back again (a few times under different conditions if possible). Of course, free (or low cost) use of a dyno would be helpful.

Of course, you just need 2 cars. Maybe a second Elise owner in your area who is also considering the mod, if it works out.

[Ruediger]

Chris

Scientific approaches cost time and money but sometimes they are needed.

Ruediger