Finally got my turbo prelude tuned ......the good and the bad.
Well on Tuesday after 3 years of my build process I finally got to Payn Technologies to get tuned. My prelude was rock solid on the dyno and running on a conservative and steady 11:1 af. My best run ended putting down a decent 273 hp and 255tq to the wheels on a mustang dyno at 13 psi, on my t3/t04b super V .63 ar turbonetics turbo. I was hoping for 280/280, but I think my small 2.25 downpipe is the main bottleneck. Btw the dyno is THE most nerve racking thing when your car is at full throttle for about 5-10 sec in 4th gear. I had sounds in my head of my car blowing up! When all the tuning was done the car ripped through first second and third gear.
Well after the 5 hour drive back, I was about 5 minutes from home on the 290 and was playing with all this new found power, and after a hard 4th gear pull I look down and my temp is shot up in the red. Pull over immediately and pop the hood..my coolant overflow tank was full and coolant had shot out to the battery side of the engine bay…NOT GOOD! I call AAA and get towed home.
Well long story short.. checked and researched a few things and it’s my conclusion it’s my headgasket. So now i have to yank the head off The increased boost pressure must have aggravated it as I kinda slightly overheated in the past when my spal fan wasn’t working.
Here’s a scan of the last dyno made…the second to last one netted the best numbers. Notice the fat torque curve…perfect for the street. Btw..Payn is the shiznit…I wouldn’t trust anybody else after watching Tom and Devin tune my car on their dyno.
What was the timing? If your HG went id say there could have been small amounts of det. I had the same thing. I thought it was tuned fine but the blew.
Re: Finally got my turbo prelude tuned ......the good and the bad.
Quote:
Originally posted by Ludecrous777 Well on Tuesday after 3 years of my build process I finally got to Payn Technologies to get tuned. My prelude was rock solid on the dyno and running on a conservative and steady 11:1 af. My best run ended putting down a decent 273 hp and 255tq to the wheels on a mustang dyno at 13 psi, on my t3/t04b super V .63 ar turbonetics turbo. I was hoping for 280/280, but I think my small 2.25 downpipe is the main bottleneck. Btw the dyno is THE most nerve racking thing when your car is at full throttle for about 5-10 sec in 4th gear. I had sounds in my head of my car blowing up! When all the tuning was done the car ripped through first second and third gear.
Man, that is great! Good numbers, especially with a Mustang dyno!
Sorry to hear about the HG, I'm sure you can fix it.
I had the pleasure of talking to Tom Payn for an hour one morning. Awesome guy, I think he is one of the "sleepers" in the Honda world. I rate him as one of the top 3 Honda/Acura engine people in the US. Only other people I would consider for that short list is Larry (Endyn), or Brad (RLZ).
That turbo you have has excellent spool. Very nice; good change of pace from the stupid crap you see on Honda-Tech all the time that don't spool until 7000. What engine management are you using?
Is the block sleeved? If it is I would guess it's probably not the head gasket but one of the sleeves dropped..
Up here in Toronto we finding the almost every re-sleeved block (not necessarily T-sleeves) has eventually dropped a sleeve. It's not the engine builders fault as far as we can tell, but it occurs because of the heat cycling... Once the sleeve drops and it gets fixed none of the motors had overheating problems again.. nor did it ever have dropped sleeve related problems again.
Weve been finding that this happens in NA engines within 1 year (shorter if it's raced) and about a month if the engine is FI..
One of the local builders here now goes as far as heat cycling the block in an oven prior to reassembly to try to prevent this problem for reoccurring..
the sleeve drop was "marginal" (which means measureable)... The engine is getting redone now, but it just got to the machine shop so we'll have to wait for that info to come back.
We're pretty sure the coolant was coming in the intake side because all 4 pistons are shiny on that side :P
Apparently the sleeves dropping occurs on both open and closed deck blocks.
When I was speaking to a couple of mechanics and one engine builder they say this can happen on all Honda blocks, but every occurrence I have seen (3 -- plus potentially mine eventually) are on h22s.. but that is probably because I don't personally know anyone with a sleeved H23 and rarely deal in detail with other cars other than Preludes. An engine builder obviously would see more variation in Engine types, so based on that I would trust what they say...
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The increased boost pressure must have aggravated it as I kinda slightly overheated in the past when my spal fan wasn’t working.
What engine management are you using?
Linear Mode
