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02-22-2019, 02:39 PM #16Screaming And Flying!
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From the pics on the other thread, the top over bottom triples vs side by side triples. Not sure which version goes with which T but the side by side results in far more equal length to system exit. Both versions have independent triples which run pulses within that triple without interference to the other triple, divided.
Spacing lengths within the triple of side by side version would likely enable higher ex durations and port to port pulse arrival time in optimum range earlier in the rpm range and still hold into the high rpm. Scavenging of both sides, triples would be near equal vs the top over bottom triples.
Would be interesting to see all the versions, chest to end and the fire orders.
Last edited by FMP; 02-23-2019 at 04:30 PM.
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02-22-2019, 02:55 PM #17
subscribed.........
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02-22-2019, 03:51 PM #18
Thanks for the information. That does shed some light. The crank was inside the box with the kit, so that does suggest a boxing error. Having no crank makes sense and also explains the lack of connecting rods. I'll try and take some pictures next week of the components in the box. That IS my former Switzer with the twister, but has somebody's art work with the cowbell image on the side. The boat is long gone unfortunately, but I still have the engine here and it hasn't been cranked since the day it came off the boat..
Membership upgrade options: http://www.screamandfly.com/payments.php
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02-22-2019, 08:46 PM #19
Wow, too bad no pic a Star with that Twister Norris! I have known Bobby Switzer since, well way too long as lived Illinois near him and Carol. My 10 year older brother had a Baby Switzer 20H Merc when I was a 6 years old kid! Sad Bobby has passed on, but never forgotten. I been west coast 25 years now (Idaho border state here WA). Out here my Merc Guru (Dr Frankenmerc) has a couple Twisters. I haven't seen him awhile as (lives 20 miles from me) I been laid up. Getting better, stent in leg have blood flow again! Gotta see him summer. Always a soft spot me anything Switzer or MERC! Link Shooting Stars pix..
https://images.search.yahoo.com/yhs/...9&action=closeLast edited by Robby321; 02-22-2019 at 08:49 PM.
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02-23-2019, 01:54 PM #20Screaming And Flying!
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How much of a spacer and have you the actual export to export distances at the cylinder within the triple? I would think the spacer was to delay the arrival through distance port to port at the lower rpm to a more beneficial arrival range before port closing to save an over ported bottom , mid range outcome. The higher duration if ported so enabling the high 8000.
Actual port ° numbers would be interesting.Last edited by FMP; 02-23-2019 at 04:14 PM.
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02-23-2019, 03:10 PM #21
Hey raceman How the hell have you been
1994 Brad Collins Mirage Jag.with 1990 2.4 BP E.F.I Offshore
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02-23-2019, 08:19 PM #22Screaming And Flying!
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Twisters were 135 type blocks... so big log setup. When Merc came out with the 140/150 blocks the inner plate was different, it had the exhaust angled back forth.... where the 135 style blocks and inner plate went 90* of the bores. Merc did that on stock motors to give more breathing in the log. The T2 used the same Idea on inner it was angled, just paired in 3 +3. The spacer gave more area.... that matched the lower exhust tube for the rear exhust log. It was all about closer pairing and flow. And less weight, easyer casting. Just IMO.
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02-23-2019, 08:28 PM #23Screaming And Flying!
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Spacer would yield longer port to port pairing
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02-23-2019, 09:10 PM #24Screaming And Flying!
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The spacer that I am talking about bolts to the block..... giving more area. Your not on the same page.
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02-23-2019, 09:15 PM #25Screaming And Flying!
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Between the block and exhaust ? I need a pic ?
From the line of parts https://www.screamandfly.com/showthr...ial-lookup-T2&Last edited by FMP; 02-23-2019 at 09:18 PM.
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02-23-2019, 11:11 PM #26Screaming And Flying!
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If you look at Drolls pixs in that thread..... If you look at the block pixs....the spacer has the throttle pivot.The next pixs show the different exhaust plates. The 2 to the Left are T2s. It,s hard just looking at pixs but the long run is top clys and tuna tube. The short one is the bottom bank pairing... the tuna tube is in the exhaust housing. The is no tuna tube for the long bank in the exhaust housing. Darn I could use a drink.......
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02-24-2019, 08:21 AM #27Screaming And Flying!
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Yes, I see the removable spacer. The two on the left are T2, top bottom triples. Long, short run to ex end.
The short run is lacking the distance to end.
Both triples remain independent to each end with the spacer, so port to port distances increase within the triple. A facing view of the ex port side with spacer and all without cover should show this.
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02-24-2019, 10:07 AM #28Screaming And Flying!
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The more area , where do achieve this? I see it as more ex runner length from sleeve to outlet within the common triple. A couple more inches travel distance from port to common triple to next closing port within that triple. That would achieve a few extra degrees of delay as mentioned above.
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02-24-2019, 10:21 AM #29Screaming And Flying!
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I can,t explane it to you and I give up, if you have it all..ALL in hand it starts making sense.
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02-24-2019, 10:28 AM #30Screaming And Flying!
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Nothing to give up, the spacer must increase the runner length while keeping the triples independent of each other or it all spills together.
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