Author Topic: Bigger turbo, more aiflow but not more HP?! (Read 124280 times)

40rtyp · « **Reply #225 on:** July 11, 2012, 09:31:06 PM »

Kelu,

Since you have a lot of drag racing experience, I was going to ask you if by chance what you think the limit of the diff and axles are? You think that it can take a good hard launch on Drag radials with your current power and be just fine? I know its a Cadillac CTS diff so it should be a good quality. I've heard the trans is good till about after the 500+hp range(Dave from DDM told me). What do you think about the diff?

Kelu · « **Reply #226 on:** July 12, 2012, 02:55:22 AM »

Quote from: LatinVenom on July 11, 2012, 08:50:53 PM

Looking good Kelu, hope this those the trick on the track for you.
I agree the the Drag radials are a must to get the car to grab the pavement and not let go.
I think with what we looked at the 12's are certainly there to make it happen.

Sounds about right Alvaro, constant 12s is my target for this year, petty I won't have more than 1 or 2 races where I can test.

Quote from: 40rtyp on July 11, 2012, 09:31:06 PM

Since you have a lot of drag racing experience, I was going to ask you if by chance what you think the limit of the diff and axles are? You think that it can take a good hard launch on Drag radials with your current power and be just fine? I know its a Cadillac CTS diff so it should be a good quality. I've heard the trans is good till about after the 500+hp range(Dave from DDM told me). What do you think about the diff?

I can't say about the limits of the diff and axles because I didn't reach them

All I know is that with stock turbo I was doing over 400tq which was very bad for tranny and I didn't had any problems until now. With GT3071R I do only 350tq and a lot more hp, this was my target of upgrading the turbo because I hated tq spike of stock turbo. So it should be easier for tranny/diff/axles with less tq.

My "insurance" about this was to buy extra tranny, diff, axles from a ruined GT.
Also I used semi-slicks (Toyo R888) only at 2 races, all my other races where with street tires which spin on our weak preped tracks and don't put so much pressure on the drivetrain.

I think in terms of rating the parts Dave is more experienced and saw way more Kappas at the limit than me. I hope Dave is right about drivetrain to hold without issues up to 500hp.

40rtyp · « **Reply #227 on:** July 12, 2012, 03:43:16 AM »

I'm hoping that is the case as well. I'm working on also getting an extra diff and Tranny and possibly axles. I know that Dave has extra Trans he can sell, not sure if he has a diff as well.

Dave@DDMworks · « **Reply #228 on:** July 12, 2012, 07:27:14 AM »

When it comes to the transmission, diff, etc. horsepower and torque numbers are not the only thing that will have an effect on longevity. If you are drag racing the car with drag slicks on a well prepped track with a hard launch, that scenario will put a lot more stress on the trans, diff, axles then a car with similar power on street tires driving around town with an occasional full throttle pull from a roll.

Critterman · « **Reply #229 on:** July 12, 2012, 09:43:47 AM »

I believe Bill Hahn snapped an axle way back when he was building and testing the 06 that ASAP now owns. He should be able to tell you the limits.

Bill Hahn Jr · « **Reply #230 on:** July 12, 2012, 10:32:19 AM »

Quote from: Critterman on July 12, 2012, 09:43:47 AM

I believe Bill Hahn snapped an axle way back when he was building and testing the 06 that ASAP now owns. He should be able to tell you the limits.

Right you are. We found the reasonable safe limits of the stock axles to be about mid 12-second passes. Hitting the high elevens on drag radials took upgraded axles that we developed in conjunction with The DriveShaft Shop. We've sold a few sets to daring individuals who, like me, were compelled to give it their all at the dragstrip!

I don't wish to pirate this thread, but I'd be happy to expound further if someone would care to start a new thread on this subject. Feel free to start it in the Hahn RaceCraft forum section if you would like.

Kelu · « **Reply #231 on:** July 12, 2012, 01:43:45 PM »

Hahn are you talking about LE5 or LNF axles?

They are different?

40rtyp · « **Reply #232 on:** July 12, 2012, 02:13:10 PM »

Sorry Kelu to go a little off subject in your thread. I'm just going for similar goals in power as yours and the drivetrain will be directly effected so........

Now, upgrading the axles is something I've also looked into but at the same time I've thought "Well, even if you were to upgrade the axles the new power is going to look down the line and find the next weakest link, isn't it? So now even if you had 1000hp rated axles the diff will probably be the next to go.

kennysabarese · « **Reply #233 on:** July 12, 2012, 02:32:07 PM »

Pretty sure LNF and LE5 axles are the same.

Critterman · « **Reply #234 on:** July 12, 2012, 02:41:08 PM »

Bill, thread hijacking is an art, and freely practiced on this board.

Sol Asylum · « **Reply #235 on:** July 12, 2012, 03:35:18 PM »

In fact Elff and I got Kelu to help us hijack this thread just yesterday.

Dave@DDMworks · « **Reply #236 on:** July 12, 2012, 03:42:24 PM »

Quote from: Kenny on July 12, 2012, 02:32:07 PM

Pretty sure LNF and LE5 axles are the same.

Actually the 2.0L and the 2.4L have different part numbers -

2.0L
Left hand - 15919080
Right hand - 15919179

2.4L
Right hand - 15296760
Left hand - 15296759

Bill Hahn Jr · « **Reply #237 on:** July 12, 2012, 03:56:02 PM »

Quote from: Kelu on July 12, 2012, 01:43:45 PM

Hahn are you talking about LE5 or LNF axles?

They are different?

LE5 in this case. The BullRun Solstice (formerly known as SoulFood) is a 2.4 car.

As to the piracy policy here...Arrrrr, I get ye now, mateys!

elff · « **Reply #238 on:** July 12, 2012, 04:08:23 PM »

Kelu actually gave it a name

The KP Drift Team

One other bit of Forum knowledge

Kenny Sabarese takes about 1 month to make a decision on anything and will go back and forth during the entire time period.
[I can't wait for him to see this]

Arabas · « **Reply #239 on:** July 12, 2012, 04:14:22 PM »

Quote from: elff on July 12, 2012, 04:08:23 PM

Kenny Sabarese takes about 1 month to make a decision on anything and will go back and forth during the entire time period.
[I can't wait for him to see this]

Kenny had a chance to tie you in the dungeons of Count Dracula and leave you there for bugging him all the time. he didn't, so he cant compain now that u still poke him

elff · « **Reply #240 on:** July 12, 2012, 04:16:05 PM »

The last thing I want to see in writing is
A greek telling me to Poke another man.

Please rephrase that

Arabas · « **Reply #241 on:** July 12, 2012, 04:18:12 PM »

Quote from: elff on July 12, 2012, 04:16:05 PM

The last thing I want to see in writing is
A greek telling me to Poke another man.

Please rephrase that

first Kenny, now you

me ???
damn i also missed my chance to tie you in the dungeons of count Dracula's castle...
and no, i don;t mean kinky tie...i mean the one you re left there with no food and no water, no help

Sol Asylum · « **Reply #242 on:** July 12, 2012, 06:45:28 PM »

Quote from: elff on July 12, 2012, 04:08:23 PM

Kelu actually gave it a name

The KP Drift Team

One other bit of Forum knowledge

Kenny Sabarese ~~takes~~ makes about 1 month to ~~make~~ take a decision on anything and will go back and forth during the entire time period.
[I can't wait for him to see this]

Hey Professor did I fix that correctly for Elff?

Kelu · « **Reply #243 on:** July 12, 2012, 07:03:31 PM »

Quote from: Arabas on July 12, 2012, 04:14:22 PM

Kenny had a chance to tie you in the dungeons of Count Dracula and leave you there for bugging him all the time. he didn't, so he cant compain now that u still poke him

I think Kenny still trying to decide on that

Quote from: 40rtyp on July 12, 2012, 02:13:10 PM

Sorry Kelu to go a little off subject in your thread. I'm just going for similar goals in power as yours and the drivetrain will be directly effected so........

No problem in this case, we are still talking about performance of Kappas

Quote from: 40rtyp on July 12, 2012, 02:13:10 PM

Now, upgrading the axles is something I've also looked into but at the same time I've thought "Well, even if you were to upgrade the axles the new power is going to look down the line and find the next weakest link, isn't it? So now even if you had 1000hp rated axles the diff will probably be the next to go.

Now that we have the power I'm just testing to see the next weak spot, I don't care which one it is because I know I moved on step ahead.

Bill: no worries about off topic at all, great info coming from someone who experienced

So the LE5 and LNF have different or same axles?

More dangerous for drivetrain than drag slicks and prepped tracks are circuit tires on prepped tracks because they are soft compound and very stiff tirewall which doesn't flex at all. Slicks are flexing and dissipate huge shocks on the axles/diff but with circuit tires you get all the shocks transmitted to the axles because they are sticky enough not to spin.

Around here drag slick/radials are very expensive because they are not approved for commercial selling in whole Europe. Many drag racers are using circuit tires or semi-slicks which are tranny killers in my opinion.