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05-20-2010, 10:10 AM | #251 |
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Someone put their BW videos on Youtube. I need more of those sweet spooling sounds!
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05-20-2010, 01:44 PM | #252 |
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Not much , I have roughly the same or higher compression and my 30r spool up never showed any really noticable advantages... Sure it spools a hair faster but not much ....the cosworth intake manifold and all the other cossie stuff working hand in hand is helping spool up most IMO....you wouldn't expect it with big cams ect but I think this is a rare case.... |
05-20-2010, 02:13 PM | #253 |
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Cam you think The E85 tune on syoungs car is going to spool even better? That's what I'm hoping + the E85 and high compression will work really well together also, that will make serious power @ 30psi
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05-20-2010, 04:00 PM | #254 |
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That is my hope as well. I swear our builds are quite similar. Although the W->A intercooler might differentiate them a bit. For good or bad, I don't know, lol.
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05-20-2010, 04:13 PM | #255 |
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05-20-2010, 04:39 PM | #256 |
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The cossie intake manifold DEF hurts spoolup. The runners are large. Back to back testing has showed the power band is shifted to the right. I dont recomend it for GT30R or smaller.
C |
05-20-2010, 06:48 PM | #257 |
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I think it will. I can't wait to see some 30psi E85 results. My 88-75 should be finally shipping in about 2 weeks.
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05-20-2010, 07:23 PM | #258 |
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What's interesting is that no power was gained switching from the 4088r to the 91-79.. I did loose some torque.. I can only assume that I need to have my car retuned for the 91-79 and that the advantages of the BW only show though beyond 25psi...
I'll post comparble 4088r logs with a polt against the 91-79 later tonight.. Last edited by syoung0298; 05-20-2010 at 07:35 PM. |
05-20-2010, 07:33 PM | #259 |
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Nice!! Alot of twinscroll setups are about to hit the streets very soon.... I'm getting my injectors the 28th and it's on! I'm interested to see your E85 results on the 88-75 that should be sick , I was going to get that turbo for a little faster spool up , then I got a chance to grab a 91-79 1.00 a.r and I jumped on it but I figured it's so big I won't ever have to worry about upgrading again and I can keep the boost lower for around town bs , then crank the hallman a few times when it's time to boost out
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05-20-2010, 07:50 PM | #260 | |
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Quote:
Edit Also in your BW log you start the log at 900rpm in 3rd gear.... That kinda gets the engine chuggin weird, I always start at 2000 just so the engine doesn't chug like that and possibly consequently start the pull with it pulling timing ...Maybe hydra doesn't pull timing as easily as the subaru ecu's tho idk.... Anyway more logs more logs!!! Last edited by TDagen; 05-20-2010 at 07:57 PM. |
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05-20-2010, 10:24 PM | #261 | |
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regarding temps it was a hot day, 85 degree ambient.. I beleive that this is close to the best response from the 91-79, which is very impressive for such a large turbo; still better than many others that I've seen; my point with the 4088 comparison, was merely that it spools faster. This isn't a big suprise as the 91-79 is significantly larger. more logs to come. |
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05-20-2010, 10:37 PM | #262 | |
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sick |
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05-20-2010, 10:49 PM | #263 | |
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i ordered full=race kit with 83-75 1.00 a/r.i will also be on e85 coupled with a high compression longblock from element tuning.although i wont be pushing it past 28/29 psi. |
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05-20-2010, 11:35 PM | #264 | |
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05-20-2010, 11:44 PM | #265 |
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Btw syoung I'm just saying all this bc I really like your setup and I hope you can get the bw too spool the same or at least really close to the same as the 4088... You know your going to wanna keep the turbo with the bigger power capabilities... Are you going to let Phil tune both turbos or just one? Don't rule the bw out just yet bro!
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05-21-2010, 09:10 AM | #266 | |
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05-21-2010, 11:49 AM | #267 |
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I have an 83-75 1.00 a/r coming in along with a fully built long block. It should be interesting to see us compare results even though mine isn't a Full-Race kit.
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05-21-2010, 04:22 PM | #268 |
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Not only that but it is custom made to your heads and port job. Should be a good set up. I just hope mine does not spool tooooo much later than the 88-75. But judging from the 91-79 above, mine should be just fine. I can live with 22 psi by 4700.
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05-21-2010, 06:26 PM | #269 |
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that is badass to have both.geoff was telling me to go 88-75, but i thought it was too big for my goals.i cant wait to see you're results now.
Last edited by jazmak24; 05-27-2010 at 08:50 PM. |
05-21-2010, 07:05 PM | #270 |
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^yeah cam obviously doesn't play games ... If I had two turbos I would be a wreck ... I'd be changing them like the weather ... ... "weekends here better put the big one on"
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05-22-2010, 07:09 AM | #271 | |
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IIRC Geoff calls the 1.00 a/r a 'weird' housing and the 1.00 is not T4 based either right? Oh well.. |
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05-22-2010, 09:29 AM | #272 |
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The 1.00 is a T4 sized housing.
From their website on the 83-75: Full-Race recommends the 1.00 A/R modified to 3" Vband for boost levels over 25 psi |
05-23-2010, 01:55 AM | #273 |
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gt4088r vs 91-79 at 21 psi ..
Please note, the 91-79 makes more torque and will flow more than the 4088r above 25 psi. Although, this shouldn't be taken as gospel, rather a quantitative back-to-back comparison with an identical setup (e.g. motor) identical timing values .. albeit the 91-79 pull as made with 20 degree higher ambient temp, which likely accounts for the difference in power. What the plot does not communcate is that even thought the 91-79 makes more torque, it does so with slower transient response (feels laggier below 4500 RPM than the 4088r) |
05-23-2010, 12:20 PM | #274 |
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Let's see the log for that airboy, logs shows more than that plot... To me it looks like the 91-79 is clearly spooling faster than the 4088 in that set of logs. This is probably an example of a log where the 4088 had a bad log ( pulled timing , weather , really could be anything, like I said my logs on the 30r would change sometimes if I did the log during day vs night ect... I have heard that The Borg Warner comes back into boost between shifts much faster than the Garrett BB, that's what I'm looking for... If I'm racing I know imgoing to be racing and can keep the engine at an rpm that will have the turbo ready to roll, or brake boost so im not worried about the transiet response ( turbo lag) but you cannot control the boost between shifts... Have you noticed this with the bw between shifts at all syoung?
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05-26-2010, 04:24 PM | #275 | |
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-on the borgwarner 83-75 and 88-75 i prefer the 1.00 a/r, this is an outstanding housing. -on the 91-79 the 1.10 a/r is my choice for the *Garretts* the 1.00 is a funky housing and the 1.06 is the one to use. The garrett housings are VERY different from the BW housings! |
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