GT28RS vs. IHI VF22 Dyno test

[HiBoost TS]

I was able to test both the GT28RS and the IHI VF22 turbos on the same car, at the same boost levels and with the same exhaust and engine. 26 more WHP on just the turbo.

I have a customer who was not happy with his upgrade in his VW Golf GTI turbo that came with a GT28RS. I told him to try the IHI VF22 that I use on many cars with 1.8 to 2.4 liter engines.

We fabricated a flange to adapt the IHI to the manifold and made a new flange to fit the downpipe.

The results are what I expected. I had tried the GT28RS on a customers car (MSP) and the difference in power was noticiable being greater in the car with the IHI.

In both dyno runs, the boost would go as much as 14 psi and then dropped to 10 psi. I think that is the way the ECU controls it. If it kept the boost, the difference could have been even larger.

It seems to be a little bit more lag with the IHI but that is because it is a 1.8 liter engine. That is not much an issue with the FS 2.0 in the Proteges.

Here is the dyno sheet.

 

[Focus]

It seems to be a little bit more lag with the IHI but that is because it is a 1.8 liter engine. That is not much an issue with the FS 2.0 in the Proteges.

Here is the dyno sheet.

What does Turbo Lag have to do with engine displacement? The turbo stays the same.

 

[HiBoost TS]

What does Turbo Lag have to do with engine displacement? The turbo stays the same.

If you have a larger turbo on the same engine, it takes more time for it to build boost. A larger displacement and a torquier engine has less lag than a smaller engine or with less torque.

 

[Focus]

If you have a larger turbo on the same engine, it takes more time for it to build boost. A larger displacement and a torquier engine has less lag than a smaller engine or with less torque.

Yes, but wouldn't the 28RS spool up faster than the IHI on any engine ?

 

[mp5jeff]

more displacement = spool turbo fastAR(in most cases, in piston engines anyways),

 

[HiBoost TS]

Yes, but wouldn't the 28RS spool up faster than the IHI on any engine ?

Yes, the 28RS will probably spool up faster in any engine. I was just explaining why the curve is a little lower in the IHI than the 28RS, but in the protege the IHI spools very, very fast.

 

[Mental Addiction]

Do you have a compressor map for the VF22?
Something tells me it only flows 30lbs a minute while the GT28RS is at 35lbs.Before I go any furture I would like to see if you have a compressor map..

 

[RyanJayG]

I'm wondering why the GT28rs dyno run was conducted with "type AG" or all gear for the layman, when it was obviously never shifted, and the IHI VF22 dyno was conducted with "type RO" or roll on, and with significantly different humidity. for this dyno to have any real meaning it would have to be conducted the same day under the same conditons.....

 

[505zoom]

I'm wondering why the GT28rs dyno run was conducted with "type AG" or all gear for the layman, when it was obviously never shifted, and the IHI VF22 dyno was conducted with "type RO" or roll on, and with significantly different humidity. for this dyno to have any real maning it would have to be conducted the same day under the same conditons.....

(mswerd)

You made these dyno runs over a month ago, but just now made this thread? (scratch)

 

[505zoom]

...I had tried the GT28RS on a customers car (MSP) and the difference in power was noticiable being greater in the car with the IHI.

So, customer's MSP with GT28RS vs. your P5 with IHI VF22, correct? Was there anything wrong with the MSP that was equiped with the GT28RS? (evil)

 

[Super Matty P]

Juan, you have to forgive them.....they get REAL defensive if someone says they've got something more effective/cheaper/reliable/etc\


good ups to you Juanio!

 

[JDM Sam]

I'm wondering why the GT28rs dyno run was conducted with "type AG" or all gear for the layman, when it was obviously never shifted, and the IHI VF22 dyno was conducted with "type RO" or roll on, and with significantly different humidity. for this dyno to have any real meaning it would have to be conducted the same day under the same conditons.....

Good point and I concur!

 

[505zoom]

Juan, you have to forgive them.....they get REAL defensive if someone says they've got something more effective/cheaper/reliable/etc\


good ups to you Juanio!

Nah, nothing like that at all man. I just don't believe that the IHI VF22 is better than my personal turbo of choice. It's how old of a design? 10 years? 15 years? I don't see how it could even match the RS series Garrett.

Add on to that the sketchy date, the questionable differences in temp/humidity and settings... and the fact that you can pretty much make a dyno tell you whatever you want, I just don't see this being right.

Just my .02, take it as you will matty.

 

[Super Matty P]

How should I take it when another turbo vendor comes into this thread to make "b.s. accusations" and then his following of customers come in and back him up?? I consider that hating. Your posts in particular were not bad but this is such bad policy that I'm ashamed.

I wish the moderators here had some sort of backbone when it came to putting verbal fights between competing vendors. This is just classless. Juan NEVER goes into anyone else's threads and questions their means or methods. NEVER.

 

[RyanJayG]

if the moderators had some sort of "backbone" as you put it, you'd still be Banned from the first, second or third times. and do we really need to pull up "verbal fights"?

just throwing out some fact, not trying to fight

 

[Mental Addiction]

How should I take it when another turbo vendor comes into this thread to make "b.s. accusations" and then his following of customers come in and back him up?? I consider that hating. Your posts in particular were not bad but this is such bad policy that I'm ashamed.

I wish the moderators here had some sort of backbone when it came to putting verbal fights between competing vendors. This is just classless. Juan NEVER goes into anyone else's threads and questions their means or methods. NEVER.

My post was not bashing him.I'm just looking for a compressor map.If the IHI VF22 is better, I will change my kit to the cheaper more effiencent turbo(VF22 is several hundred cheaper)..But my gut feeling tells me this isn't the case, so I need a compressor map to figure out a few things.I have no grudge with Juan and I'm sure he doesn't either.Infact we have talked through PM several times exchanging info..So don't try and turn this into an issue.

Next on backbone, if they did that it would nail your coffin closed for good(insanoman2005,turbomattyP,etc).

 

[ddogg777]

You guys just need to bookmark this page: http://not2fast.wryday.com/turbo/maps/all.html#gt
Someone over at the suby forums says that the VF22 runs 460 CFM at 18.0 PSI.
I'll also attach some maps of the Vf-22...The VF line is the RFH5 and the 22 flows the most of the line, if I remember correctly.

Enjoy and @ Super M: stop accusing of vendor fights, this is not one.

 

[bonesmp5]

Good job Juan --- and regardless if it was 26whp or 10whp --- or if the dynos were excact or not ----


The point is -------------> HIS customer was happy that should count for something ?? ----- just my 2cents



Happy Holidays ----------------(hi)

 

[Super Matty P]

In all honesty I can't be banned thanks to my dynamic IP address but that is neither here nor there. I was banned for some comments I made and I don't make them anymore...end of story.

Back ON topic: Anytime Juan posts some info about his stuff someone with a MAM banner is going to come in and throw doubt and chaos into it. It's just sad. This is not Beau personally but his "following".

 

[ddogg777]

My post was not bashing him.I'm just looking for a compressor map.

Doh! You beat me to it. Beau, I think some people just read your posts negatively 100% of the time.