So what are you Guys reving your 2.5L's to?

[glhs875]

Simon, some more work and you may have a 2.5 that peaks at 6500rpm or so. Good job!

[Aries_Turbo]

I can give it some spark advance.

and take some out up top where it was knocking.

a cat cost ken 11hp and 20+ ftlbs on a 2.2L 8v with a stock head and a 50 trim.

Brian

[turbovanman²]

Simon, some more work and you may have a 2.5 that peaks at 6500rpm or so. Good job!

Such as?

and take some out up top where it was knocking.

a cat cost ken 11hp and 20+ ftlbs on a 2.2L 8v with a stock head and a 50 trim.

Brian

Yes, I know. I know have no knock with the TPS fixed but its now a bit lean, maybe because its alot colder outside.

Brian, this isn't a regular cat, its tiny and flows like a sewer pipe,
I put it on and listened to it at idle and revved up, no change in the exhaust note, on, off, on, off, no change,

[glhs875]

Such as?

Do you really want to know?

[turbovanman²]

Do you really want to know?

Yes, I do, I am always open to learning. Now applying, that's a different story,

[Aries_Turbo]

Now applying, that's a different story,

No Kidding! lol

"but it pulls sooooo hard when the timing is cranked and its pinging like crazy!!!!..... the HG is popped for some strange reason and there is coolant everywhere and i just cant figure out why...."




Brian

[turbovanman²]

No Kidding! lol

"but it pulls sooooo hard when the timing is cranked and its pinging like crazy!!!!..... the HG is popped for some strange reason and there is coolant everywhere and i just cant figure out why...."




Brian

Yeah, yeah, yeah,

[glhs875]

Do you really want to know?

When I have more time I'll PM you some of my thoughts and ideas.

[GLHSKEN]

My cat is so small, I would honestly guess its costing me 5 hp, if that.

I just found out my TPS was bad, reading 3.96 volts all the time but it actually changed to 4.15 at WOT.

My cat cost me 11 hp on the dyno.... Catco 3" high flow... sewer pipe just like yours

[turbovanman²]

My cat cost me 11 hp on the dyno.... Catco 3" high flow... sewer pipe just like yours

It's not a catco, not even close to yours. Now I would venture to say the rest of my exhaust is costing me that or more but for now, I am leaving it alone.

When I have more time I'll PM you some of my thoughts and ideas.

Thanks,

[GLHSKEN]

It's not a catco, not even close to yours. Now I would venture to say the rest of my exhaust is costing me that or more but for now, I am leaving it alone.





Thanks,

Yep, I had a "bullit muffler... SO your 5hp # for exhaust flow is wrong... BTW... Doubt your cat is less restrictive than the catco..

[Aries_Turbo]

lets see an internal pic of your cat, Simon. what kind is it.

Brian

[moparzrule]

lets see an internal pic of your cat, Simon. what kind is it.

Brian

Looks like one of those ''spun'' cat's-

http://cgi.ebay.com/ebaymotors/High-...Q5fAccessories

[turbovanman²]

lets see an internal pic of your cat, Simon. what kind is it.

Brian

Looks like one of those ''spun'' cat's-

http://cgi.ebay.com/ebaymotors/High-...Q5fAccessories

You forget already Mat, its the dynomax one we thrashed about in the converter thread. I'll dig it up later.

[moparzrule]

You forget already Mat, its the dynomax one we thrashed about in the converter thread. I'll dig it up later.

Ahh yeah I remember now.

[JodyB]

http://www.turbo-mopar.com/forums/sh...4&postcount=20

[turbovanman²]

http://www.turbo-mopar.com/forums/sh...4&postcount=20

We know,

I forgot to update, my cat was plugged solid on this dyno run, doh!

Also, engine was soooooooo tired, it would fill up the catch can at the track and at least once a week,

[moparzrule]

http://www.turbo-mopar.com/forums/sh...4&postcount=20

Not too much on topic there, since he specificially states that both engines were 16 valves. I knew something was wrong when I looked at the dyno chart. With the exact same top end on a 2.5 (on an 8 valve) it will not make as much HP as a 2.2 and certainly won't rev as high.
This only further proves my point. The 8 valve heads are restrictive enough as it is...pumping more intake and exhaust through because of larger displacement only hurts more. For an 8 valve, 2.2 FTW. For a 16 valve hybrid, 2.5 is fine but personally I'd still rather have a 2.2 anyway. The results speak for themselves-

http://www.turbo-mopartimes.com/

Look at the majority of the peope in the 10 second bracket, not counting the 2.4's it's mostly 2.2's. And the only one in the 9's? 2.2. How can you honestly argue with that? 7 out of 10 people in the 10's are running 2.2, and 7/10 in the 11's are running 2.2's.

[ATaylorRacing]

For comparison, old Matchbox is using a stock block 2.5 with no bal sfts. A lot of last year I was using test and tunes to find the best shift pts for the best or most consistant ets. This still has the stock roller 410 lift cam too. Keep in mind that this is using a non feedback carb and stock 2.5 efi header. For the quickest ets I shifted at 5000 from 1-2 and 4800 at 2-3. For the most consistancy I shifted at 4850!!!

35 time NHRA/IHRA Drag Race Champ
05 SRT4 / S2 / 12.87 @ 110 / DOTs
05 Mustang V6 / wifes / 15.17 @ 92 BONE stock
96 Geo Metro / 3 cyl - 1 ltr - 55 hp / 19.84 @ 66
84 Horizon / used to run 13's no power adders

[turbovanman²]

Not too much on topic there, since he specificially states that both engines were 16 valves. I knew something was wrong when I looked at the dyno chart. With the exact same top end on a 2.5 (on an 8 valve) it will not make as much HP as a 2.2 and certainly won't rev as high.
This only further proves my point. The 8 valve heads are restrictive enough as it is...pumping more intake and exhaust through because of larger displacement only hurts more. For an 8 valve, 2.2 FTW. For a 16 valve hybrid, 2.5 is fine but personally I'd still rather have a 2.2 anyway. The results speak for themselves-

http://www.turbo-mopartimes.com/

Look at the majority of the peope in the 10 second bracket, not counting the 2.4's it's mostly 2.2's. And the only one in the 9's? 2.2. How can you honestly argue with that? 7 out of 10 people in the 10's are running 2.2, and 7/10 in the 11's are running 2.2's.

Not sure what your saying Matt, the argument was all 2.5's, not 8 valve and Larry's engine makes more power 2.5 than 2.2.