Money Shot!
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| 4L build http://gemellocattivo.com/forum/viewtopic.php?f=2&t=36 |
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| Author: | Madhatter [ Fri Jul 01, 2016 10:10 pm ] | ||
| Post subject: | Re: 4L build | ||
Money Shot!
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| Author: | PSk [ Sat Jul 02, 2016 5:35 am ] |
| Post subject: | Re: 4L build |
I thought inlet trumpets had to be "bull nosed" to be effective, like: http://www.team-bhp.com/forum/attachmen ... eu_inj.jpg My understanding is the air is pulled in over the sides ... Pete |
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| Author: | Madhatter [ Sat Jul 02, 2016 12:56 pm ] |
| Post subject: | Re: 4L build |
For a straight walled tube, yes the bull nose is the best option. These trumpets have a 1.5* taper but use a bezier curve to do so, the top is flared out for aesthetics and flow. I did flow calcs on the trumpets and intake run, I'll have to dig them up but the numbers were very good. |
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| Author: | Madhatter [ Wed Aug 03, 2016 12:51 am ] | |||
| Post subject: | Re: 4L build DYNO UPDATE | |||
DYNO UPDATE Managed to survive a couple days on the dyno, unfortunatly the dyno did not survive. We ended up only being able to pull to 8500rpm then the dyno decided it was happier puking water and not behaving. Could not hold 3k rpm or anything above 8.5k rpm, the surging due to faulty servos apparently. Decent power but not what we wanted, silver lining is that we ended up doing the pulls with a last minute sourced set of stock 348 headers vs the custom ones that are still somewhere in Italy... The headers are a choke point above 6k rpm. I've been using another Engine simulation software, EngMod4t, After tons of input it's scary close to real world results. Uncorrected values, screen shot of 447.3 would be multiplied by 1.05 to a corrected SAE J607 resulting in 469.66 We had a couple pulls peaking out just over 500, 502, 507 etc.. @ 8700rpm but then the dyno blew a hose and flooded the room! That's about 530Hp at 8700rpm NA! not bad really wanted 600Hp. Fuel was 111 octane race fuel. The blue flame out the back was quiet the sight on deceleration.
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| Author: | mk e [ Wed Aug 03, 2016 11:28 am ] |
| Post subject: | Re: 4L build |
Well done! I'm sure you'll find the missing few HP wiht the headers and other tweaks...but most importanly IT RUNS! 
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| Author: | Madhatter [ Thu Aug 04, 2016 5:09 pm ] | |||
| Post subject: | Re: 4L build | |||
Thanks! It runs good actually, always a bit of tense moment when spinning a new build up to 9k though. We did have one event that was a 'pucker factor 11" .... Just about to hit 8.5k on a pull when all of a sudden there was an explosion of oil and smoke !!!! Immediately shut it down and went in to investigate. The scavenge pump was loose and one of the low side hoses from the pan was off. Somehow the bolts that held the adapter plate for the pump had worked loose and since they are captive it backed off the pump assy, the pump stopped turning and the hose also managed to unscrew itself as well ??? The real scare was weather or not the cam survived.... Oh and the cam timing trigger is also in this housing... I must have a solid gold horseshoe in my ass that weighs a ton! ZERO damage, ZERO! reassembled and back up to pulling to 8.5k inside an hr. The clearance between the trigger and sensor is 2mm how it didn't touch anything I'll never know!
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| Author: | Madhatter [ Sun Aug 07, 2016 6:39 pm ] | ||
| Post subject: | Re: 4L build | ||
Ahh, going over all the video Nick found the one with the 500+Hp, I was busy watching the AFR. Don't have a print out of this pull unfortunately. But it shows that this engine has the power we just need to fine tune it to get it all out. Uncorrected 522 = 550... Soooo close,oh so close to 600... 
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| Author: | mk e [ Mon Aug 08, 2016 11:19 am ] |
| Post subject: | Re: 4L build |
and that's at only 7500 rpm....it should be still climbing. When does the engine go in the car and Nick get to drive it? |
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| Author: | Madhatter [ Mon Aug 08, 2016 11:37 am ] |
| Post subject: | Re: 4L build |
Juggling a couple engine builds and projects, probably drop the engine in this week before I leave. But I'll be back up in September as we've got a project coming in from Australia and another gent driving in from Colorado to supercharge his 328. Best laid plans and all, I don't hold my breath for actually driving in the next week though. Before the yrs up hopefully but not this week. I'm also trying to get the LeMans engine into another restoration that's wrapping up and holds priority. |
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| Author: | mk e [ Mon Aug 08, 2016 11:47 am ] |
| Post subject: | Re: 4L build |
Nick's got to be chomping at the bit....but business has to come first...I guess..... |
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